(Note: There is also a links area in this help file!)
Gameboy Developer's Kit
Pascal Felber
Needed to compile your C files.
http://www.gbdev.org/GBDK/
SHINŽEN Entertainment
Manfred Linzner
Makers of the GHX Soundengine (a commercial gameboy soundengine).
Find GBDoK here.
http://www.shinen.com/GBDoK/GBDoK.html
Gameboy Development News
Jason
Daily updated site telling about the day's development. Also contains ASM and C examples,
utilities and misc. shit.
Find GBDoK here.
http://www.gbdev.org/news/
Gameboy Mailing List
The maintainer of this list is Kalle Pihlajasaari.
Mailing list... don't e-mail with ROM requests or stuff answered on webpages/this doc.
http://www.ip.co.za/people/kalle/gb/list.htm
Gameboy Webring
Genetic Fantasia
List of several gameboy development webpages
http://www.geneticfantasia.com/html/webring.html
No$Gmb
Martin Korth
Best all-around gameboy emulator and debugger. Shareware, though.
http://www.work.de/nocash
DBOY
BouKiChi
Freeware Gameboy Color/SGB emulator based off of an early VGB.
http://members.xoom.com/foo01/
Harry Mulder's Gameboy Development
Harry Mulder
Author of Gameboy Tile Deisgner and Gameboy Map Builder.
http://www.casema.net/~hpmulder/
Gamelist's Mailing List Archive
Gamelist
Rarely updated archive of the mailing list. Visit here before mailing the list.
http://www.geocities.com/SiliconValley/Platform/6906/
Bung Enterprises
Bung
Makers of flash carts and other goodies to test your gameboy programs on the GB/CGB.
http://www.bung.com.hk/