Abtranslate is a command line tool for translating the Al Bhed language found in Final Fantasy X and X-2.
aInvisiclue is a small program to decode the Infocom InvisiClues. It won't translate the whole files as you should only translate one hint at a time, but it is very easy to cut and paste.
blinkentools is a set of commandline utilities related to Blinkenlights. It includes b2b, a converter for blinkenmovies that can apply some simple effects, b2mng, which creates MNG animations from blinkenmovies, and bsend, which sends movies over the net using the Blinkenlights network protocol.
gBhed is a GTK frontend for translating the Al Bhed language found in Final Fantasy X and X-2.
Tetristats is a tool to convert TetriNET servers winlist files to HTML. It supports Tetrinetx and JetriX score files.
Universal Game Genie Convertor
Universal Game Genie Convertor converts between the codes used by the various incarnations of the Galoob Game Genie and address:value pairs (with check bytes where appropriate). It is universal in the sense that all existing Game Genie systems are supported: Game Boy, Game Gear, Megadrive (Genesis), NES, and SNES.
Wad2PDF is a program that converts the levels in Doom wad files into PDF files. The result has a bird's eye view of every level, with floors neatly texturized and all items in the level in their proper places. The PDF output can be imported to graphics programs for further editing or printed out directly. You can even create wall-sized mega posters of your favorite Doom levels.