Macintosh statistical software

Free statistics software for Macintosh computers (Macs)

Updated 12/11/2022

What about cryptographic signing and error messages when you try to install free statistical software for Macs? See our “signing page.” ... and does this work on Mojave? Is it signed and 64-bit?

Skip forward to the software listings.

Meet the free SPSS clones

by David Zatz

I have taught statistics using JASP, Jamovi, and PSPP. Each has advantages and disadvantages, and there is nothing stopping you from using all three depending on what you are trying to do. Ironically, each one has a much faster user interface than SPSS—and all import and export SPSS .sav and syntax files.

JASP is a fork of (it was originally based on) Jamovi; both are still under active development, which have fairly similar user interfaces, and both saved a good deal of time and trouble by not reinventing the wheel—they are essentially user interfaces for another statistics program, the hard-to-learn-and-use R.

  JASP Jamovi PSPP
Regression Stepwise, forward, backward, multi-step enter Only Enter (multi-step OK) Enter (one step)
Missing values Program-wide only By variable By variable
Statistics engine R R PSPP
Signed Yes Yes! No
M1 native Source, not binary Source, not binary Source, not binary

The programs have spreadsheet-like data editors, but it's best to prepare information for them somewhere else; they let you computer variables, but in a clunky and hard to use way. Importing variable labels and missing values from SPSS files sometimes fails (I've only seen the missing values problem on Windows), a major drawback to programs that will read SPSS files otherwise.

  JASP and Jamovi PSPP
t-tests Shared variance only?!? Shared and unique variance
Cost Free Free
Output Copies as tables Copies as plain text
More modules? Yes No
Windows Unified Two or three windows
Syntax No, but can show R code Yes, SPSS
Contextual help Yes, nicely integrated No
Command logs Yes (can’t easily replay) In theory/may not work
Mac open/save boxes No No
SPV file viewer No For SPSS 26 and below
Frequently updated Yes No
Size Enormous (1GB +) Small (~124 MB)

* This ability is very limited starting with SPSS 28 due to changes in the .SPV file format

JASP and Jamovi share lightning-fast speed; a wide range of statistics, with extra plugins on Jamovi; and easy installation on Macs, Windows, and Linux. Their basic interface has an Office 365-style open/save/print/export tab; options on the left, output on the right layout; instant changes to the output if you change the input; and export of both data and output, as desired. JASP shares Jamovi’s horrible recoding facility, and goes further by not letting you set missing values for one variable at a time.

There’s a third SPSS clone which emulates an old version: PSPP. There are some nasty bugs and quirks. It's easier to master if you're used to SPSS, but development has been slow and JASP and Jamovi may be better options unless you do a lot of data manipulation, or do a lot of t-tests. Then PSPP is the best choice. However, I’m concerned over the exceedingly slow pace of development, and not having a real Mac user interface makes it painful at times.

What do I use in my class? We do t-tests, crostabs, correlations, and stepwise regressions. We use SPSS after all, but students don't like paying $50 for six months of SPSS rental. We have online access to it, via Apporto, but that doesn’t really work for most people. Some use the trial version of SPSS, starting late and finishing early.

My preference would be to use PSPP, which is very similar to SPSS (employers tend to use SPSS); PSPP is close to SPSS in concept and user interface. It is clunky and the interface does have some bugs; it can be hard to install. SPSS, meanwhile, is huge, painfully slow at times, and pricey after you graduate. JASP and Jamovi are very nice front ends for R, but they do not work with t-tests where the groups have different variances

In the chart below, there’s one thing to add—all these packages are absolutely enormous in disk space.

Program Unique Goodness Deal Killers
  • Free, fast, easy to install
  • Can save output along with data
  • Instant output
  • Allows stepwise regression
  • Universal missing values
  • Cannot recode and manage data; can filter it
  • t-tests require two-value variables, you can’t specify two values of a variable
  • Uses enormous amount of disk space
  • Poor handling of different-variance independent-sample t-tests
  • Free, fast, easy to install
  • Can save output along with data
  • Instant output
  • Hard to recode and manage data
  • t-tests require two-value variables, you can’t specify two values of a variable
  • Poor handling of different-variance independent-sample t-tests
  • Uses enormous amount of disk space
  • No stepwise, forward, or backward regression
  • Free
  • Interface similar to old versions of SPSS
  • Easy to manipulate variables
  • Same syntax, data formats as SPSS
  • No stepwise regression; no multi-step regression
  • Unsigned
  • Quirks (e.g. not recognizing SPSS files unless you select "show all files," not reading its own pasted syntax)
  • Slow development
  • Buggy in OS 11 (Ventura)
  • The standard
  • Easy data management
  • Saves actions in syntax and data journals
  • Crazy expensive for regular use
  • $55 for six month student license
  • Slow
  • Takes up a lot of disk space

* This ability is very limited starting with SPSS 28 due to changes in the .SPV file format; and indeed, SPSS 28 can't read some SPSS 29 output files.

For professional use, JASP and Jamovi are somewhat limited since they do not let you really use syntax. I can’t help but be optimistic for the future of Mac statistical software, though—and for years, I would never have said that. — David Zatz, 2022

Note: PAST is very comprehensive—and makes no attempt to match SPSS.

The SPSS clones in more detail

All three of the SPSS clones have some oddities, as shown in the table above, which may not be addressed in the foreseeable future; the developers are adding a great deal of statistical capability without addressing these issues.

PSPP: The SPSS Clone

Current version: Mac version 1.62 (same as Linux)
Listing updated 12/9/2022
Last known software update: July 2, 2022 (Mac version)
Download size: just 44 MB!
Note: Unsigned software; MacPorts, Homebrew versions available as well as binary

PSPP is a free SPSS clone with a Mac version you can download from this site (it’s unsigned). You can also build from source, but that's another level of effort (and, if you use MacPorts, a crazy amount of overhead to build one program). The pre-compiled Mac version is under 60 MB, and loads quickly, making SPSS look like a sloth. This would be my favorite SPSS clone, if not for a number of problems—the largest one being very slow development and excess Mac and Windows bugs. Development is around one year per 0.1 release. Its ideal environment is Linux.

The interface is similar to SPSS, with menus in the windows and not in the menubar, and its own frustrating version of the open/save box. It can’t use custom folders (including OneDrive and Dropbox). PSPP does import SPSS data files, long variable names, and variable and value labels. Common options are included in some dialogue boxes without the need to dig deeper.


You can copy from the output window—but only from the left-hand contents, not from the main pane. The output window yields plain-text, delimited by spaces and pipes. That’s not ideal for importing to spreadsheets or word processors, unless you’re really, really good at using BBEdit. There’s also no way to clear anything from the output window.

Our getting-started guide for SPSS is also helpful for getting started with PSPP.

The capabilities are impressive, including graphing. It’s a fine way to avoid spending thousands of dollars on the big cheese. A great deal of work has gone into the analyses themselves, and the routines the program does run are well fleshed out. The user interface is awkward, but it’s fast; while on SPSS it takes a long time for windows to form and disappear.

Downsides. PSPP can't find .sav files unless you specify “all files.” Alos, new bugs for MacOS Ventura:


Regression does not allow for multiple step entry or forward, backward, or stepwise models.

Until SPSS caught on, you could use PSPP to open SPV files with the original formatting. Warning: this stopped working consistently with SPSS 28, which changes the file format. There is no SmartViewer for Mac past version 24, so you can’t read these files with SmartViewer either.

We have a few videos for using PSPP.

JASP: the first really good effort at making R more accessible

Current Version: 0.16.4
Listing updated: 12/8/2022; program updated 10/3/2022
Not signed by Apple (you may see a warning)
906 MB download, 1.8GB on disk!

JASP was created as “a low fat alternative to SPSS, a delicious alternative to R,” and comes out of the University of Amsterdam.

JASP uses the native open/save dialogue box, albeit with a weird Microsoft Office-style setup requiring more than one click; and JASP is easy to install. It would be very nice if it was signed. JASP has extensive Bayesian statistics capabilities which may confuse people who are not looking for them.

The software looks and feels like SPSS to a degree; it feels as native as SPSS. Calculations and screen drawing are far, far, far faster than in “real SPSS” — when you select the tests, they might actually be pumped out before your finger is fully off the mouse. Stepwise regression is supported (unlike Jamovi). However, when you do t-tests, if equal variances are not present, it only prints out a warning, rather than using the alternative method of calculating t. When that happens, you are supposed to switch to Welch’s t-test instead of using the dual-variances formula of the classic Student’s t-test. The format for multiple t-tests is quite neat.

jasp t-tests

We loaded our large test file instantly, and ran descriptives instantly. Survey researchers will be happy to know they can assign value labels — and unhappy to know they must be done variable by variable, without syntax. Labels are retroactively applied to the output window, very rapidly. Unfortunately, too, variable labels are not supported—nor is there a good way to compute new variables. The ideal method is to export the data, make the changes, and bring it back again. You can't mark missing values variable-by-variable; missing values are applied to the entire dataset, which is a bit nuts.

Other issues include the lack of easy to use syntax and a syntax journal; no easy way to manipulate data; no support for date or time variables; and no ability to direct output to new variables. t-tests require two-value variables (you can't pick, say, Dodge vs Chrysler from a list of automotive brands; you have to create a new variable consisting solely of Dodge and Chrysler), which is a nuisance, especially given the painful interface for recoding. Variable names have to be fixed up before importing data, because the variable lists work in alphabetical order and don't show labels.

JASP is under rapid development. The clever user interface, allowing users to go back and change things in a past run simply by clicking on it in the output pane, is shared with Jamovi; the speed is terrific, if not quite at Stata levels. Pretty much everything is instant, while on SPSS it takes a long time for windows to form and disappear. You can also set the resolution of charts, so you can copy them at 300 dpi if you want.

JASP’s advantage over Jamovi is that it supports forward, backward, and stepwise regression, while Jamovi only supports "Enter." The reason is ideology, so we don’t expect that to change. JASP also has niftier menus and nicer output, and Bayesian statistics up the wazoo. There may be more advantages. Jamovi does have its own advantages...see below.

There is a great deal of documentation at the site JASP for Nonprofits (which sadly has not been updated since 2016), and the newish book Learning Statistics with JASP. There is also a new Machine Learning module with 13 “analyses that can be used for supervised and unsupervised learning.”

Dive more deeply into JASP (full MacStats review).

Jamovi: deceptively powerful

Current Version: 2.3.21
Listing updated: 12/9/2022; program updated December 2022 (updates are roughly once a month)
Now has an online “cloud”  version
Cryptographically signed by Apple; Big Sur OK
378MB download, 976MB in place

Jamovi: A free, open source package, built on top of an R foundation (Thanks, Dr. Kim-Oliver Tietze). Jamovi uses a simple spreadsheet interface with full graphics, and while it allows you to use syntax, you can also use menus. You can edit via spreadsheet; and your data, analyses, and options are saved in a single file, so others can reproduce your work. A large number of analyses are easy to find, or you can use R syntax.


The results are attractive (see above), with menus that will be familiar to any SPSS users — and with many options. Copying and pasting output is cleverly done; right-click on a section of output, and you can paste it into Word as a nicely formatted table. Paste into BBEdit, and it will be plain-text, formatted with spaces. Plots can also be copied and pasted, but seem to be limited to screen resolution; there are three built in plot themes, including an SPSS-clone one.

The online (cloud) version is experimental but very responsive.

A syntax mode shows the generated R syntax for each menu command, helping you to learn R syntax or make scripts to reproduce the same actions over and over, ... except for importing data. Data can be imported in numerous ways, including formatted SPSS files and, according to the programmers, SAS and Stata files. When we imported an SPSS file, value labels came through, but it does not support variable labels at all. Likewise, it did not export variable labels consistently. Export from Jamovi to SPSS resulted in errors on some data files as the number of characters in some fields was not correctly marked.

Shortcomings. (These have been verified as still existing in version 2.3) Jamovi is fairly fast, but (like PSPP) doesn’t fully use the Mac interface; pretty much everything is instant, while on SPSS it takes a long time for windows to form and disappear. If you click on "Browse" in the file open/close menu, you do get access to the native file selection system.

Jamovi’s menus are kept within its own window instead of at the top of the screen, and the open/save dialogue box is very different, though it does show shortcuts for the documents, downloads, desktop, and home folders (it also has the odd new Microsoft approach to open/save/print, creating a whole new window/interface for it). You can, however, drag and drop data files onto it — saving time.

Variable names have to be fixed up before importing data, because the variable lists work in alphabetical order and don't show labels.

For ideological reasons, you only get Enter for linear regression. You can however do multiple blocks (enters), so you can still do sensible multiple regressions. Regression uses the term “covariates” instead of the usual “independent variables.” It allows easy entry of factors and weights.

As with JASP, if you do a student’s t-test on groups with different variances, it prints a warning rather than using the alternate formula; at this point you are supposed to switch to Welch’s test. More concerning: t-tests require two-value variables (you can't pick, say, Dodge vs Chrysler from a list of automotive brands; you have to create a new variable consisting solely of Dodge and Chrysler), which is a nuisance, especially given the painful interface for recoding.

Other issues include no easy way to manipulate data; no support for date or time variables; and no ability to direct output to new variables. You can’t copy and paste from BBedit into Jamovi, but must use its clunky though powerful data transformation system. The program is almost quite large on disk, due to the integrated software — R, Electron, Mantle, Python, and ReactiveCoca.

Other notes

Developer Jonathon Love pointed us to the Jamovi library of extra procedures. A long, well-illustrated Jamovi blog post also goes over the fine graphics capabilities within Jamovi, which PSPP can only dream of.

Accuracy is pretty much assured by the R underpinnings. In our run-throughs, the numbers were identical to SPSS, PSPP, and JASP.

Dive more deeply into Jamovi (full MacStats review).

Other free general statistics software

Past 4 (PAleontological STatistics): an absurdly wide-ranging, easy to use package

Current Version: 4.09
Listing updated: 2/25/2022 (program updated 2022)
64-bit and Catalina capable
Signed by Apple (App store version)

Past is free software for scientific data analysis, with functions for data manipulation, plotting, univariate and multivariate statistics, ecological analysis, time series and spatial analysis, morphometrics and stratigraphy.” That said, Dennis Helsel wrote, “While its name shows its origin (Paleontology), it is a full-fledged stat package which includes multivariate and permutation tests, with a nice interface.” There is good support for geographical and map-based statistics.

past statistics

When Dennis says “full-fledged,” he isn’t kidding — the range of this software is stunning. Yet, the download is a mere 10 MB — far, far, far less than many others. What’s more, every new version brings a wide range of new features—even 0.0x versions. Summary statistics came in a fraction of a second on a laptop. Our survey file never caused more than a slight pause.

Downsides. Import formats are limited and exclude SPSS and Excel files; some rather esoteric formats are accepted, though, and you can copy and paste from Excel (with caution). Large files (e.g. 40,000 cases) can choke it. There are no value labels, but there are variable levels (click Column Attributes and you can enter variable names) and there is scripting.

You can transform data but without the flexibility of some other software; you cannot set missing values. Transformations tend to the complex, leaving out the simple. The "select data and then operate on it”  format is clunky; and if you choose columns rather than specific data groups, the program essentially freezes trying to deal with a huge number of cases. There is no way to do independent-sample t-tests by having one variable define groups; you need to have each group in a different column, and only select the data you want to analyze.

Overall, Past is not necessarily the best general-use program, though it is excellent for some of its features.

Dive more deeply into PAST (full MacStats review).


Current Version: 2.8 (updated May 2019; prior version was dated May 2017)
Listing updated: 2/16/2022
64-bit, signed, works well in Mojave

Michael McLaughlin’s Regress+ is a free package that includes regression, stochastic modeling, bootstrapping and robust goodness of fit measures. The software and a tutorial are available at the Regress+ web site. Older versions are still available for older operation systems, while version 2.5 is available for OS X and 9.2.

The program is accompanied by full documentation in PDF form which doubles as a statistics reference guide.

Regress+ 2.7, née Regress+ 3.0, was a complete rewrite; it added data modeling (equations and distributions), extensive documentation, and publication quality graphics. Regress+ 2.8 was a substantial upgrade.

This program appears to cover every aspect of regression you can think of. It's graphically oriented but has strong statistics. The code is “more than 100 times faster than before [2.7].”


Configurations: Requires Java; should work on Intel and PPC Macs
Current Version: 5.6
Listing updated: Feb 2022. Software: 10/20/2021
Not signed

Statistics101 is giftware to help teach probability and statistics the easy way—by simulation. “Gain deeper understanding of traditional statistics concepts and methods. Increase your awareness of the role of variability in probability and statistics. Learn and apply simple to very sophisticated statistical techniques without tables or complicated formulas.” Interprets and executes the simple “Resampling Stats” programming language. The original Resampling Stats language and computer program were developed by Dr. Julian Simon and Peter Bruce to teach statistics.

A somewhat steeper learning curve or tougher install

R (CRAN) / “R for Mac OS X” / R.App and R GUI

Current Version: 3.6; under active development
Signed, 64-bit, requires XQuartz
Listing updated 8/2019

This is an exceedingly flexible program, with a large number of libraries and built in routines, and the ability to run many S or S-Plus programs. R loads and runs quickly but has a steep learning curve.

R programs and algorithms are distributed by the Comprehensive R Archive Network (CRAN). A simple and somewhat frustrating graphic user interface is included for Mac users; R Commander can be installed using the built-in package installer, which can also install file import features (which aren't installed by default). R Commander is an X11 program, which means it uses an alien interface and has odd open/save dialogues, but if you get past that it offers menu driven commands not dissimilar from, say, SPSS, just a lot more awkward to use, and without an output or data window.

There are now numerous front ends for R, several of which are mentioned earlier on this page.

R has a massive range of tests, PDF and PostScript output, a function to expand zip archives, and numerous other unexpected features. For much more information about R, including advantages, drawbacks, resources, and tips, see our incredibly outdated R statistics software for the Mac page.

R Studio

Current Version: 2022.02
Listing updated: 2/25/2022; program updated 2/2022
Basic version free; non-basic versions thousands of dollars per year
Signed by Apple

R Studio is commercial open-source software, designed for creating and managing R applications rather than, say, doing exploratory research or testing the odd hypothesis. With frills, it can get expensive, but without frills, it’s free. It’s 500MB plus R itself at around 130MB, and requires a separate R download; R itself is updated regularly and has a signed Mac package.

r studio

When you first load R Studio, it tells you to go back and install R. Once you've done that and restarted, it finds R easily enough, and presents you with an integrated development environment (IDE). If you try to do something, such as importing SPSS data, that isn’t possible without further downloads, it automatically connects to the Internet and installs whatever you need. The user interface is Mac-standard in most ways — you get a menu at the top of the screen (as well as menus in the window itself), and the open/save dialogues are thankfully quite normal.

Though you can manage your R installation from R Studio, it’s a tool for dealing directly with syntax, and for managing projects; it’s not a beginner’s tool (as, say, Jamovi can be). R Studio never claims to be anything but an IDE, with many options and good operating-system integration.


64-bit compatible
Current Version: 9.5
Listing updated: 2/16/2022 • Program updated 2022
Size: 3.5 GB (yes, GB)

SageMath is not specifically for statistics; it’s general math software, but it has the ability to do numerous statistical processes including graphing/plotting. It can be used for just about any type of math, and can be used either with the command line or or from a web browser. You can install it onto a server if you want, and create embedded graphics, typset-style math expressions, and more; it also includes sharing. The program was designed for both education and research. It is not a typical Mac program; it has a command line element and is accessed from browsers.

SageMath was built atop existing packages including NumPy, SciPy, matplotlib, Sympy, Maxima, GAP, FLINT, and R.

Specialty tools


Current Version: 1.0
Listing updated: 2/2019 (program updated 2/2019)
Signed, 64-bit; good for El Capitan through Mojave
Currently just 4.6 MB, no license; intended to become open source at a later date

From the writer of Regress+ comes a free, powerful program to analyze any kind of data. MacMCMC is part of a two-part set—the other part being a free ebook. Data can be imported from plain text (UTF-8). There are 27 built-in distributions, including 16 continuous, 8 discrete, and three homogeneous mixtures — Normal, Bivariate Normal, and Poisson; users can also define their own distributions. There are 15 built-in functions. Reports include MAP, mean, median, mode, and Gelman-Rubin; credible intervals; trace; plots of marginals; and trace comparison for selected chains. The program has other features, described on its web site, along with a sample input, data, model, and output.

Advantages of MacMCMC, in addition to its price, include being a complete standalone Mac program (hence its small size and fast operation); 100% Bayesian inference; parallel processing; and access to low-level options. Users can check for updates from a dropdown menu. The basic method of using the program is to set up the model via a simple text format, easily figured out from the examples or the ebook; load data (in ASCII format); run Compile, run Setup, change any parameters desired, and then run. That yields a plain-text report and a graph which can be adjusted as needed.


Current Version: 3.194 / requires OS 10.7-10.13
Older versions: 680x0; PowerPC; OS X (Universal Binary); Windows and DOS
Listing updated: 8/2019 (program updated Feb, 2019)
Signed, 64-bit; no mention of Mojave

G*Power was developed by Axel Buchner to provide power analyses for the most common statistical tests in behavioral research: t-tests, F-tests (including ANOVA, regression, etc.), and Chi-squared tests. G*Power computes power values for sample sizes, effect sizes, and alpha levels; sample sizes for given effect sizes, alpha levels, and power values; and alpha and beta values for given sample sizes, effect sizes, and beta/alpha ratios. It is a remarkably small program, just over 2 MB in size. Updates (for both Mac and Windows) are slow, with nothing but bug-fixes since March 10, 2014. Version 3.1 itself dates back to 2009, though there were numerous improvements from 2009 to 2014.


gretl can do general statistical routines and many specialized ones; it is in our “special purpose and general math programs” page.

GMT (“The Generic Mapping Tools”)

open sourceCurrent version: 5.45
Program updated: Jan 4, 2019
Listing updated: 9-2-2019

Command-line tools that run on Unix-like systems, including Mac OS X. See for details. Many of the main developers, including Paul Wessel, use Mac OS X. From their site, GMT is...

... about 80 command-line tools for manipulating geographic and Cartesian data sets (including filtering, trend fitting, gridding, projecting, etc.) and producing PostScript illustrations ranging from simple x–y plots via contour maps to artificially illuminated surfaces and 3D perspective views; the GMT supplements add another 40 more specialized and discipline-specific tools. GMT supports over 30 map projections and transformations and requires support data such as GSHHG coastlines, rivers, and political boundaries and optionally DCW country polygons. GMT is developed and maintained by Paul Wessel, Walter H. F. Smith, Remko Scharroo, Joaquim Luis and Florian Wobbe, with help from a global set of volunteers, and is supported by the National Science Foundation. It is released under the GNU Lesser General Public License version 3 or any later version.

Graphviz and Instaviz

open sourceConfigurations: PPC (older versions), 10.5+ (current)
Current Version: 2.20.3
Software updated prior to 7-7-13
Listing updated 9-2-2019

Graphviz is the AT&T open source drawing package. The Mac OS X version and the overall project have their own web sites. The OS X version uses the Aqua user interface. Prepare for a steep learning curve but it may be worth it if you have graphs you do frequently; not what I'd suggest for the occasional one-off though. Note that graphviz does not seem to have had any development for around six years, but Instaviz, an IOS version, is available on the Apple store; it has shape recognition so finger sketches can become graphs for flowchart.

The Graphviz (Mac version) description on their web site was last updated in April 2008. InstaViz, on the other hand, is selling for $8 on the App Store, and was last updated with version 3.8 in 2016.


open sourceConfigurations: PPC (older versions), Intel (current)
Current Version: 4.6.3
Listing updated: 7-7-13
Program updated: 4-18-13

gnuplot is open source scientific plotting software. It is available online from many sources


Current Version: 2.2.1
Last update: 4-6-2013
Listing updated: 4-24-2018

open sourceKevin Sullivan’s open source OpenEpi software is available in four languages; unlike most software, it can be run from a web server or on a regular computer. The programs are written in Javascript and html and should be compatible with Macs and Linux and Windows machines. Test results are provided for each module to allow people to check reliability of their own setup. The software is set up for epidemiology and has numerous key statistics for that field, along with the usual means, medians, t-tests, ANOVAs, powers, etc.


StatCrunch is a freely available for web-based use, currently without advertisements, with a $5 per user fee for use on your own server, or $5/six months. It has the usual range of basic statistics, from t-tests to regression to ANOVA and nonparametric tests, with a wide range of graphs also available, and works from Excel or text files. StatCrunch will also store your data within reason. For those with low budgets or infrequent needs, StatCrunch's fairly easy to use interface and price are extremely attractive (it also makes sharing data easy).

Geographic resources

free Mac statistics softwareGRASS

Configurations Available: Mac, Linux, Windows
Price: Free (and open source)
Current Version: 7.8.5 / 8.0 Preview
Listing updated 10-3-2021
Last software update, 12-21-2020

Michael Barton pointed out that GRASS is used for geographic resources data management, image processing, graphics production, spatial modelling, and visualization of many types of data. It is an official project of the Open Source Geospatial Foundation.

Originally developed by the Army as a tool for land management and environmental planning, GRASS is a powerful utility with a wide range of applications in many different ares of scientific research. GRASS is currently used in academic, government, and commercial settings. Attributes are managed in a SQL-based DBMS.

GRASS 6 added a new topological 2D/3D vector engine and support for vector network analysis. A new display manager has been implemented. The NVIZ visualization tool was enhanced to display 3D vector data and voxel volumes. Messages are partially translated with support for FreeType fonts, including multibyte Asian characters. New LOCATIONs can be auto-generated by EPSG code number. GRASS is integrated with GDAL/OGR libraries to support an extensive range of raster and vector formats, including OGC-conformal Simple Features.

free Mac statistics softwareQuantum GIS

Configurations Available: Mac, Linux, Windows
Current version: 3.20
Price: Free (and open source)
Signed for newer Mac versions
Listing updated 10-3-2021; last release, 9-10-2021

Quantum GIS is a somewhat less powerful but easy to use GIS package for Mac, Linux, and Windows. It is also an Open Source Geospatial Foundation project, and it supports numerous vector, raster, and database formats and functions.

free Mac statistics softwareGeneric Mapping Tools (GMT) for geographic data

Configurations Available: Mac (under X11), Linux, UNIX, OS/2, Windows [requires Cygwin or VirtualBox for full function]
Current Version: 6.2.1 (released June 2021)
Price: Free (and open source)
Listing updated 10-3-2021

Generic Mapping Tools, or GMT, is an open source collection of many tools for manipulating geographic and Cartesian data sets (including filtering, trend fitting, gridding, projecting, etc.) and producing Encapsulated PostScript File (EPS) illustrations ranging from simple x-y plots via contour maps to artificially illuminated surfaces and 3-D perspective views. A MATLAB extension is available.



Free - open source - for Mac OS X
Current version: 1.2.1
Report updated: 7/2013

open sourceMatplotlib is a pure python plotting library with the goal of making publication quality plots using a syntax familiar to matlab users. The library uses Numeric for handling large data sets and supports a variety of output backend.

On August 28 2012, John D. Hunter, the creator of matplotlib, died from complications arising from cancer treatment, after a brief but intense battle with this terrible illness. Please consider making a donation to the John Hunter Memorial Fund.


open sourceSciPy is a library of scientific tools for Python which supplements the Numeric module. SciPy includes modules for graphics and plotting, optimization, integration, special functions, signal and image processing, genetic algorithms, ODE solvers, and others.

VTK (Visualization Toolkit)

May be compiled from source code for OS X, Linux, etc
Latest version: 7.1
Listing updated 1/2017

open sourceThe Visualization ToolKit (VTK) is a system for 3D computer graphics, image processing, and visualization with several interface layers. In VTK applications can be written directly in C++, Tcl, Java, or Python.

“VTK supports a wide variety of visualization algorithms including scalar, vector, tensor, texture, and volumetric methods; and advanced modeling techniques like implicit modelling, polygon reduction, mesh smoothing, cutting, contouring, and Delaunay triangulation. Moreover, we have directly integrated dozens of imaging algorithms into the system so you can mix 2D imaging / 3D graphics algorithms and data.”

Also see:

About our test survey file

Our test survey file: The “survey file” has 1,000 cases, with 40 questions on a five-point scale, two irrelevant variables (screen width and height), and a couple of demographics (shown here as “job type” and “new or old hire”). We are planning to run the same tests on each package as time goes on.

Sponsored by Toolpack Consulting

Toolpack: for information-based organizational change

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