http://forums.goonheim.com
http://feats.goonheim.com

I guess the best way I can describe these is an early equivalent to the EJ forums (sorta). The Class Discussions and PvP forums are fairly informative. I'd recommend staying out of the Public and Public Relations forums, though, if you don't have tough skin. >.>

http://www.hybes.org

Hybes (Hyborian Archives) has a great, easy-to-read, and detailed list of abilities, spells, and combos gained by every class, when they get them, and the tooltip descriptions for each one. It also has a feat calculator, as does the linked Goonheim address.