Cabri Geometry - The home site for Cabri Geometry, a dynamic geometry package .

Edu2000's Visual Geometry Series - A visual learning environment (full-curriculum, Mac/Windows) that helps students explore and understand geometry.

C.a.R. Geometry Program - A free program allowing Compass and Ruler constructions. Now also available in Java.

Dave Wilson's Poincaré Notes - A page describing some Cabri macros relating to hyperbolic Geometry in the Poincare disc model.

Singular - Computer algebra system for polynomial computations. Free download.

KwikTrig - A Free trigonometry solving program for Windows.

TTC - Mathematica package for doing tensor and exterior calculus on differentiable manifolds.

Descriptive Geometry - Software for creating and printing drawings, including conicsections, color fillings in Monge's projection and axonometry.

Home page for Qhull - Software(With C code) from the Geometry Center for Fast Delaunay Triangulation in any Dimension.

Great Math Programs - A collection of mathematical programs, with particular reference to geometry.

Riemann surfaces visualisation - Unifpack is a set of programs and C libraries designed to help in the study of Riemann Surfaces.

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

Polyhedron - Interactive application for solid geometry with 250 built-in problems. Simulates ruler, compass, protractor and other tools. Solids can be cut, displayed differently, rotated, joined again.

Ricci - A Mathematica package for doing tensor calculations in differential geometry.

MowMowMow's Cabri Room - Many Cabri files aimed at high school level geometry.

The Geometer's Sketchpad Resource Center - This Resource Center supports users of The Geometer's Sketchpad "Dynamic Geometry" software. Contents include a freely-downloadable demo and Java versions; research bibliography; online activity guide; technical support center; etc.

Geometria - A Java program in solid geometry. Solids can be measured, cut, drawn upon. 60 sample problems with resolutions.

Home Page of Isard - A free dynamic geometry package for Windows, PowerMac and Linux. Like Cabri, but in Smalltalk (and smaller). Source available : you can extend it as needed !

Math Forum: Search geometry-software-dynamic - Users of geometry software programs like Cabri Geometry II may share tips and advice at the geometry-software-dynamic discussion list.

Dr. Genius 0.5.15 - Dr. Genius is an interactive geometry program for Linux, distributed under the GNU public license. (Free)