Asgard's GameBoy Assembler	This is, obviously, a Game Boy assembler. It can be used to create home-brewn GB games, and to code trainers into games.	Download It Version 1.2 Documentation
Game Boy Tool	This utility will remove Smart Card headers from Game Boy ROMs so that they can be correctly used with both emulators and disassemblers.	Download It Version 1.2 Documentation
GBsum	This utility will calculate the checksum of a Game Boy rom, and write it back to the rom. This way roms will work when the correct checksum is required.	Download It Version 1.0 Documentation
GBMB	With the Gameboy Map Builder ("GBMB"), you can make maps which you can incorporate in your own Gameboy productions.	Download It Version 1.8 Documentation
GBTD	With GBTD, you can design tiles in different sizes, including 8x8, 8x16, 16x16 and 32x32, both in standard Gameboy, as well as colors for the Super Gameboy and Gameboy Color.	Download It Version 2.2 Documentation
HebeGB	This is a wonderful utility. It can do just about anything you could want a Game Boy utility to do. If you use Windows, check out the Win9x port below, but otherwise, this is the utility that you need for Game Boy.	Download It Version 2.5 Documentation
HebeGB9x	This is the port of HebeGB for Windows 9x, the DOS port is wonderful, but this one is even better. This is the Game Boy utility to get for Windows 9x.	Download It Version 2.51 Documentation
Instant List	This is a small utility that will create a list of each and every Game Boy ROM you have.	Download It Version 0.99à Documentation
Virtual Gameboy Tools	This is an archive of utilities from Marat Fayzullin that can do quite a variety of things with Game Boy ROMs. There is no documentation included in the package, and quite a few different version numbers on the included programs.	Download It Documentation