The actual area templates can be found in the back of the DMG.
Colored templates are nice, but I use wire to form template outlines. That way I can just lay them down on the battlemat, around the figs. Some area spells have a duration, after all, and it's nice to be able to just drop them on the field and keep going.
Gotcha covered.Somebody give Greenfield some XP for the wire idea!!!
Try Search Spells - it's a pretty astonishingly exhaustive (and amazingly searchable) index of, AFAIK, every last 3.5 spell, ever.