A cool blog, with a very specific purpose: Landon Darkwood’s Gamehacks is all about tweaking games to fit a group perfectly.
D&D:
Good advice about combat among NPCs.
Draconians: WotC article and ready to use.
The Marshal class. Cool class– very much a battle field commander. An alternative to the Bard in the party buffing role.
For RPGA: A very clear explanation of EV, CoH, and more. Also: recording the level bump in your adventure journal.
RPG tools, useful across games.
Interesting, humorous sounding board game: War on Terror and another interesting sounding Board Game: Dos Rios.