The "Software Development Kit" for Vampire : The Masquerade is now available, allowing user-made add-ons for the RPG, which was recently released in America. You can grab it here from Vampire Vault, or here from TheMasquerade
Q3Center have got their new Quake 3 coding tutorial section online
GameSpy have turned their mod spotlight on the Urban Terror mod for Quake 3 Arena
