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FreeMat
Screenshot of FreeMat in Fedora
Developer	Samit Basu
Stable release	4.2 / June 30, 2013 (2013-06-30)
Written in	Assembly language, C, C++, Fortran, Qt
Operating system	Cross-platform (Linux, macOS, Windows)
Type	Technical computing
License	GPL, older: MIT
Website	freemat.sourceforge.net
Repository	svn.code.sf.net/p/freemat/code/

FreeMat is a free open-source numerical computing environment and programming language,^[1] similar to MATLAB and GNU Octave.^[2] In addition to supporting many MATLAB functions and some IDL functionality, it features a codeless interface to external C, C++, and Fortran code, further parallel distributed algorithm development (via MPI), and has plotting and 3D visualization capabilities.^[3] Community support takes place in moderated Google Groups.