A site dedicated to decoding the Infinity Engine and the games made with it, e.g. Baldur's Gate, Icewind Dale and Planescape: Torment. Seems to be dead, but still worth a look.

The site of the unfortunately abandoned Scumm Revisited. With this tool you can take a look at the graphics and listen to the music of your favorite LucasArts adventures.

A good site that deals with hacking the file formats of the LucasArts games.

A very good tool you can play and convert music and sound from many different games (EA games, LucasArts games). It can also be used as a ripper for Wave and Voc files.

As the name suggests, this is a tool that can show graphics and sprites from games (Diablo, StarCraft)

A big database with a lot of specs and docs for many file formats.

Another site with many file format specs.

(German)
Ein Abkömmling der Game File Formats. Diese Seite beschäftigt sich ausschließlich mit den Dateiformaten zum bekannten Moorhuhn-Spiel und den diversen Klons (Vampirjagd etc.).
Ausserdem werden diese Klons getestet und bewertet, ob sie dem Original das Wasser reichen können.