Despite the failing of Glitch on a financial level, the folks at Tiny Speck have already cemented their place in our hearts. Rather than allow years of work to go to waste, the team at Tiny Speck has announced that all of the art assets (minus the logo and trademark, of course) have been relinquished to the public domain.
The entire library of art assets from the game, has been made freely available, dedicated to the public domain. Code from the game client is included to help developers work with the assets. All of it can be downloaded and used by anyone, for any purpose. (But: use it for good.)
You can find the library of assets at the link below. Hopefully the files are used for good.
(Source: Glitch HQ)