General Sites

This is a list of external modding related sites that do not quite fit into any specific category.

Official Source SDK Forums and the now-defunct VERC Network Forums
Game Design Theory - Interesting for art directors, team leaders
Detler's Team - Mapping, modelling, coding and useful sourses on Russian.
Gamedesign.net - Some helpful modding and mapping tutorials. (broken site)
GamesModding.com Tutorial Database (Down) archived version - A list of almost every Half-Life 2 modding tutorial out there.
HL2World.com - Half Life 2 Knowledge Base
Interlopers.net - News and general resources
Mapcore - A great place to get mapping, modeling and texture help from industry pros.
Mod Database - Free listings of mods for almost every moddable game. A great database full of tons of information on mods that are out there.
Nem's Tools - Several useful Source tools including GCFScape
SourceWiki Forums - (Main site now closed)
Type 3 Studios - Mods, Maps, Tutorials, Forums, and a thorough community site on the way.
Wavelength - One of the original sources of HL1 editing material, now steadily servicing HL2
Wunderboy.org - Several useful Source tools including VTFTool