GBA development and emulation:
: Demos, docs, and links to other interesting stuff
: Many faqs and documentations.
: some tutorials.
: emulators download.
: home of mappy, a great emulator for developers.
: home of VisualBoy Advance, the best emulator for gamers.
: French site about GBA programmation.
: the emulation in general.
: tons of free roms from the public domain.
: a good reference for gamers.