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Cinderella is a Java based interactive geometry tool. The only available tool that gives correct solutions to typical geometrical problems.

GEUP is an interactive geometry tool. Lets you dynamically explore Mathematics, build mathematical models of real world or create interactive mathematics presentations.

Applet that draws the famous Lissajous Figures, with mathematical explanations about it, by Geo Doubek.

Qhull for computing the convex hull, Delaunay triangulation, Voronoi diagram, and halfspace intersection about a point.

Geometrical shareware software. Anyangle (Windows/DOS) finds answers to problems involving triangles. Partydot creates patterns.

Computer algebra system for polynomial computations. Free download.

An on-line tool for understanding and measuring symmetry.