Geometry games online

I have updated the list of online geometry resources and games at HomeschoolMath.net. It became quite a long list of links! The links are categorized by topics, such as

Shapes & polygons 
Area & perimeter 
Angles 
Solids, volume, & surface area
Coordinate plane 
Congruent transformations 
Similar figures 
Circle / Pi 
Constructions 
Pythagorean Theorem 
General geometry websites 
Worksheets 
Books 
Advanced topics.

I hope this is helpful!