Game Boy

BasicBoy - http://members.lycos.co.uk/basicboy/
An open source emulator for Windows written in Visual Basic 6 and VB.NET.

BGB - http://bgb.bircd.org/
A freeware emulator for Windows.

Boycott/MacOS - http://www.bannister.org/software/boycott.htm
Boycott port for MacOS.

BoycottAdvance/SDL - http://sdlemu.ngemu.com/basdl.php
Multi-platform emulator available for Linux, BeOS, WIN32 and FreeBSD.

cingb - http://sourceforge.net/projects/cingb/
Open source emulator for DOS and Unix.

confusionGBx - http://confusion.i-networx.de/
A freeware emulator for Windows.

D-Boy - http://www.emucamp.com/boukichi/
Freeware emulator for DOS.

Game Lad - http://gamelad.emuunlim.com/
Freeware emulator/debugger for Win32/DX8.

Gameboy 97 - http://members.aol.com/autismuk/gameboy.htm
Open source emulator for DOS.

GBE - http://www.amidog.com/amiga/gbe/
Open source port for AmigaOS.

GBMac - http://hp.vector.co.jp/authors/VA009321/index2.html
Shareware emulator for MacOS.

Geek.com: Goby - http://www.geek.com/hwswrev/psion/goby/
Review of a commercial emulator for EPOC.

GEM - http://www.tni.nl/products/gem.html
A freeware emulator for MSX-DOS2 written in assembly.

GEST - http://koti.mbnet.fi/gest_emu/
An open source emulator for Windows.

GEX - http://gex.emuunlim.com/
A freeware emulator for Windows.

Gngb - http://membres.lycos.fr/frogus/gngb/
Open source emulator for Linux using SDL.

GooBer - http://goobergbe.sourceforge.net/
An open source emulator for Linux.

HelloGB - http://www.emuunlim.com/hgb/
Freeware emulator for Win32.

KGB - http://kgb.emulationworld.com/
Freeware emulator for Win32.

KiGB - http://kigb.emuunlim.com/
A freeware emulator for DOS, Linux/i386, MacOS, and Windows.

NO - http://www.work.de/nocash/gmb.htm
Shareware emulator for DOS and Win32.

Phoinix - http://phoinix.sourceforge.net/
An open source (GPL) emulator for PalmOS.

PlayGuy - http://playguy.emuxhaven.net/
A freeware emulator for Windows.

QuantumGB - http://quantum.emuunlim.com/quantumgb.htm
Freeware emulator for DOS.

TGB - http://gigo.retrogames.com/
Freeware emulator for Win32.

Victoly Boy - http://www2.hawaii.edu/~dereksmi/gameboy.html
Freeware emulator for MacOS.

Virtual GameBoy - http://fms.komkon.org/VGB/
Commercial emulator for Win32 and freeware emulator for AIX, FreeBSD, Irix, Linux, MacOS, OS/2, OSF/1, Solaris, and SunOS.

Wzonka-Lad - http://www.hut.fi/~vhelin/wzonka-lad.html
Shareware emulator for Amiga.