Scilab's main operations include: linear, non-linear, and differential equation systems; derivation, integration and interpolation; linear, non-linear, and quadratic optimization; 2D and 3D graphics, animations, matrices, and more.
Of course, when dealing with a programming language it's important to understand its syntax and main commands. You can find an introductory PDF document to help you get started with Scilab here.
For Mac OS X 10.4 or higher running on Intel. Mac users with OS X Tiger (10.4) running on PPC should download this version of Scilab 4.1.
Requires installation of the server X11.