This is a new tool I'm working on. It will have all the features the EMI Resource Viewer had, as well as some new ones, the most of them for Grim Fandango and Smush files.

An *.adp to *.wav-converter is in the works. The *.adp files seem to be 'compressed' using only 12 instead of 16 bits for the bitrate.
This project is classified as dead.

I'm currently trying to make a tool to extract files from Sudden Strike' *.sue archives. I'm already able to decompress the main directory, now just some more has to be found out...
This project is classified as dead.

Well, I figured out maiority of this format but the most important stuff is still missing. I've even coded a stupid model viewer in FreePascal using OpenGL. I might finish the specs, and then someone else who's better in those 3D viewer things can make a nice model viewer with all those nice features.
Look into the LucasArts section for the program (still an alpha).

One of the biggest things I'm working on is a decoder/player for LucasArts' Smush format. This kind of animation files is used in LucasArts games like Rebel Assault 1+2 and The Dig. A more advanced version is used in Monkey Island 3; games after CMI, like Grim Fandango, use a much more complex version which supports 8- and 16-bit images, different sound types and better compression algorithms.
See the LucasArts section for an early version of the player.

An animation player for Sierra's VMD movies, found in games like Gabriel Knight 2, Shivers, Phantasmagoria etc. Works pretty fine, but some frames can't be decoded yet so that the picture looks funny after an undecompressable image.
See the Sierra formats in the game list for specs.

A viewer for Entomorph maps (*.lib). Currently at an very early stage.
This project is classified as dead.