We now have a Witcher Nexus site.
The full list of mods has grown too large for this thread due to the character limit on posts.
Please see this GOOGLE DOC for the updated list.
The Witcher Nexus - Witcher mod database & forums.
Recommended Mods and Adventures thread - A conservative list of mods that maintain the original balance of the game by chautemoc.
Mod Request thread - Request your dream mod here.