The Roleplaying Game Design Alliance: A special place for game designers, artists, editors and others to hang out, work and network in an encouraging, positive and creative environment. Check it out!
PbPHUD.com: A friendly RPG portal and tools site for people who enjoy playing play-by-post role playing games. They offer, completely free of charge, a number of services, including forums for hosting and playing in play-by-post rpgs, an integrated and standalone dice roller, a Tab Manager for managing your play-by-post game windows, Community Chat, a Persistant Visual Map for Tactical Combat and more!
Hypertext d20 SRD: A great site devoted to the 3.5 version of the D&D game. A good resource for online information for this now extinct rpg. The game was replaced by an entirely different game labeled D&D. As the website states, this is a resource to accompany your published books, not replace them.
DeadStopWalking: Got an undead problem? Help is on the way! A cool rpg of necromancy and urban horror!
Comic Book Sites:
Avengers Forever: A large site jam packed with goodies focusing on Earth's Greatest Heroes, the Avengers, including interviews, profiles, articles, reviews, freebies, fan fiction, news, forum and much more!
Misc. Cool Sites:
The Drama Guild: A fun sight for Christian drama, providing plays and skits, galleries and a few podcasts (and yes, a shameless plug for one of my non-gaming sites!)