- Famous Curves Index

An excellent source for exploring the geometry of famous plane curves. - Visual Dictionary of Planar Curves

Another great place to learn about curves in the plane. - Mathematica Information Center

A huge depository of various Mathematica notebooks. - Differential geometry and topology, from Wikipedia, the free encyclopedia

A very nice and extensive source for learning about geometry and topology. - Geometry Junkyard

Enormous collection of links to interesting geometry on the Web. - MathSciNet

Mathematical Reviews on the Web. Research papers on any Mathematical topic.