Here is a list of sites and other portals containing other community sites, resources, distributors and developers.

Community Sites

Tool & Library Developers

Distributors & Publishers

Garage Games
-- Game Publisher

Idigicon
-- Software Distributor

Matrix Games
-- Game Publisher

Project JEDI
-- Joint Endeavor of Delphi Innovators, API header translators and distributors group

SourceForge.net
-- Open Source SVN Hosting and Distribution

Game Companies & Developers

Media Resource Sites

Frogames
-- 3D Content Packs

Groovy Loops
-- Royalty Free Music, Background Music, music loops, and sound effects

Incompetech
http://incompetech.com/ -- Royalty Free Music & Contracting (Kevin MacLeod)

Jimmy G
http://www.jimmyg.us/ -- Royalty Free Music & Contracting (Kevin MacLeod)

Royalty Free Music
http://www.royaltyfreemusic.com/ -- Royalty Free Music

SoundDogs.com
http://www.sounddogs.com/ -- Purchase Music and Sound Effects

Texture Bin 342
-- Free Textures

The MOD Archive
-- MOD, S3M, XM, IT, etc... music modules.