BioWin - BioWin
SMath Studio - Tiny, powerful, free mathematical program with WYSIWYG editor and complete units of measurements support.
AQUASIM - In order to support environmental scientists in finding an «adequate» model of the system...
Wolfram Mathematica - Mathematica has characterized the cutting edge in specialized processing—and gave the chief calculation environment to a large number of pioneers, instructors, understudies, and others around the globe.
DWSIM - DWSIM is an open-source CAPE-OPEN compliant chemical process simulator for Windows and Linux.
MATLAB - A high-level language and interactive environment for numerical computation, visualization, and programming