The current release of FreeMat is 3.0. It represents a significant improvement over the prior release (2.0). Here is a partial list of the changes:
MATLAB-style GUIs and Widgets
Speed improvements (loops and indexing operations are 10 to 100 times faster)
A new parser that recognizes more of the MATLAB syntax
A debugger that is integrated with the editor
Support for 64-bit integers
Improved MAT-file support
Universal binary support for Mac OS X
New graph/plot tools to rotate, zoom and pan plots.
Builds are now based on ATLAS for improved matrix performance
Various bug fixes.