Geometry

• Euclid
• Euclid's Elements (makes use of Java applets to illustrate geometry)
• Four Types of Symmetry in the Plane
• Geometer's Sketchpad
• Geometry Center (University of Minnesota)
• Geometry in Action
• Geometry Junkyard
• Geometry Through Art
• Java Gallery of Interactive Geometry
• LookSmart (Reference & Education > Mathematics > Geometry & Topology)
• Synergetics on the Web
• Virtual Polyhedra