Paizo Publishing – makers of the Pathfinder RPG
The Pathfinder SRD – the game at a glance
Wizards of the Coast – makers of Dungeons and Dragons
ENWorld – The Internet’s best site for D20 and D&D news
MonteCook.com – A great site by a great game designer
DungeonADay.com – Monte Cook’s ongoing megadungeon
Medieval Demographics Made Easy – Can’t recommend it highly enough.
RPGNow – A great place to find RPG-related PDFs.
Knights of the Dinner Table Online – If you’re not laughing, you’ve got the wrong hobby, Bub.
PvP Online – Read it every day. It’s good for you.
Nodwick / Full Frontal Nerdity – Two for the non-price of one!
Dork Tower – John Kovalic’s classic.
The Order of The Stick – I think I just failed a Listen check!
Yet Another Fantasy Gamer Comic – The man’s a comics-writin’ machine!
The Boardgame Player’s Association – The name says it all
Web Grognards – The best clearing house for all boardgames
Lords of the Earth – Highly detailed, interactive nation-building PBEM
ProFantasy – Makers of the Campaign Cartographer mapping software.
Lords of Theeurth – “Lords of the Earth” set in Theeurth.