Software

• Cinderella 1.4 Dynamic ruler-and-compass constructions.
• Processing Draw pictures with Java.
• Ruby Processing A port of Processing Ruby.
• Nodebox Draw pictures in python (Mac only)
• Geomview Interactive geoemtry visualization in Java.

Reading Material

• Computational Geometry Algorithms and Applications By M. de Berg, M. van Kreveld, M. Overmars, and O. Cheong

On the web

• The Geometry Junkyard