WIRIS Desktop

It is in fact a CAS (Computer Algebra System) that also includes a DGS (Dynamic Geometry System) inside. You can access a powerful calculation toolbar that includes integrals and limits calculation, function graphing in 2D or 3D and symbolic matrices manipulation. It covers all mathematical topics from primary school to University level (Pre-Calculus, Calculus, Algebra).

WIRIS Desktop is the off-line version of the tool. Check WIRIS CAS for the on-line version.

Download a trial at www.wiris.com/downloads/.