Over 10,000+ individual art assets & animations, along with client code and (very sparse!) documentation, have been made freely available for everyone. Go and make beautiful things.
A compendium of the game's items, inhabitants, and locations
Profiles of the players who made the game come to life
Players' snapshots from the game
An archive of the Glitch forums
Downloadable, reusable content from the game
Almost 200 ideas from Keita Takahashi for gameplay enhancement.