Taken from the official page: gnuboy (all lowercase) is a portable program for emulating the Nintendo GameBoy Color software platform. gnuboy is Free Software, distributed under the terms of the GNU General Public License. Our goal is to provide a great emulator that runs on many platforms and is accessible for everyone's enjoyment.

DreamGBC is a GameBoy/GameBoy Color emulator.The final objective is to emulate most GameBoy carts with some special features which a real GameBoy have not

GEST is an open source gameboy emulator that features: * emulates the Game Boy, Game Boy Color and Super Game Boy * video size select * you can choose from two color palettes in Game Boy mode * battery backed RAM saved to a file * Game Boy Camera emulation * Rumble emulation * Autofire buttons * Save states * Video layers can be disabled * Sound channels can be disabled * GBA stretch emulation * GBC default palettes when playing non GBC games can be changed during gameplay * Game Genie cheat codes (up to 10 can be used at the same time) * zipped roms supported * SGB multiplayer (2-4 players) * MBC3 and HuC3 RTC emulation

PlayGuy is a freeware emulator featuring: * Full CPU core emulation, accurate timings, interrupts, DMA, etc. * Color and Classic GameBoy support. * Ability to set default handheld - Auto, GB, SGB, Pocket GB, GBC, or GBA. * MBC1/MBC2/MBC3/MBC5 support. * MBC3 Real Time Clock Supported - SRAM and Save State consistency. * Superior sound support - All four sound channels fully emulated in stereo. * Selectable sound channels and sampling rate. * 16, 32(24) bpp color support. * Filters - MMX optimized Interpolation, 2xSaI, Super Eagle, and Super 2xSaI. * Three pre-defined windowed sizes - Small (1x/2x with Filters), Medium (approx. half screen height), Large (largest possible integer multiple). * Optional VSync to prevent screen tearing (windowed mode). * Selectable Fullscreen Mode. * Auto Frame Skip. Selectable Minimum Frame Skip. * Save States. Quick saving and loading of states via accelerator keys and up to 100 Save State Slots. * ZIP and RAR archive support. * Fully customizable button inputs - keyboard and joystick support. * Drag & Drop Support. * Recently used ROM list. * Supports Pausing and Background Deactivation. * Configurable Save Directories. * PNG and BMP Screenshots - Scalable from 1x to 8x. * Displays FPS in Title Bar/Status Line. * Status Bar Information (Windowed & Fullscreen). *] Fast Forward with Spacebar.

BasicBoy is an emulator written for GameBoy and GameBoy Color made in pure Microsoft Visual Basic 6 and VB.NET

KiGB is a gameboy Color emulator that supports the following features: * Game Boy, Game Boy Color and Super Game Boy (SGB and SGB2) emulated * Best compatibility and accuracy in graphics, sound and timing (see Compatibility) * Game Link Cable supported (allows 2 players to play over a TCP/IP network) * MBC1, MBC2, MBC3, MBC5, HuC1, HuC3, Gameboy Camera and multi-carts supported * All 4 sound channels and digital sound supported (each can be on or off) * Graphics on background, window and sprites can be set individually on or off * Battery supported * Real time clock supported * Zipped and gzipped files supported * Screen size: 1x1, 2x2, 3x3 and full screen * Frame skip supported * Joypads/joysticks supported * GameGenie and GameShark cheats supported * Screen dump supported * Save states supported * Close colors as a real Game Boy Color * Input playback supported * Save states and input files are compressed * Battery save, save states and input files are portable across all supported platforms, currently MS Windows, Linux and MS-DOS * Default border image supported * Up to 4 players are supported (SGB only) * Gameboy Printer supported * Per-game configuration * Sound wave file output * Customizable Gameboy palettes * Adjustable emulation speed (25%, 50%, 100%, 200% and 400%) * Graphics filters: Super 2xSaI, Super Eagle, scanline and bilinear * Special effect: sprite shadow (experimental) * Special porperties of LCD (Mix Frame) * Generic flashcart (most public domain, trainers and hacks required this)

TGB Dual is an emulator which forum member had been pushing me to add to this site. And for a reason: TGB Dual supports link cable support through TCP/IP (even on the same PC). I don't need to explain to Pokémon fans what the advantage of having link cable support is. TGB Dual also supports the latest Zelda games (Oracle of Seasons/Oracle of Ages). The emulator is originally in Japanese, but someone has fortunately been able to convert a reasonably recent version to English, making TGB Dual usable by the rest of the world. Unfortunately though TGB Dual crashes without reason on my own PC. Of course your mileage may vary, so I don't expect it to crash on everyone's PC. As this is an emulator for Windows, having the latest version of Microsoft DirectX installed is recommended. What the controls are can be found in the README.TXT file.

BGB is a Gameboy emulator that features: * emulation of the GameBoy, GameBoy Color, and the Super GameBoy * runs almost all roms perfectly. * Accurate sound emulation, sounds exactly as on a real GB/GBC. sound can be written to .wav file. * accurate video emulation. The screen looks exactly as on a real GB/GBC. * This emulator is fast. * Joystick/Gamepad support, everything configurable * MBC3 Real Time Clock emulation. * Auto delay/frameskip, gameboy runs at 100% real speed. * GameGenie and GameShark cheat * save/load state with quick (zsnes style) keys. * Configurable keys and screen colors. * Load from zip and gzip files * This program does not use DirectX or runtime libraries. * support for fullscreen mode with optional border bitmap. * TCP/IP game link support

Since the first version of Visual Boy Advance which lacked some major features (such as an interface), this Gameboy Advance emulator has progressed greatly. I found compatibility to be quite good and many games were playable. Actually I didn't have any problems with every game I tried, though I must admit I didn't test a whole lot of games. The games ran at full speed (with sound) on my Celeron 900 Mhz., so if you have a similar or faster PC you shouldn't have any problem either. A Pentium III 500 Mhz. is the absolute minimum requirement to play games. The Gameboy Advance is a 32-bit machine so emulating it requires more CPU power. ZIP Support Visual Boy Advance has ZIP support. This means you don't need to unzip your ROMs before playing. Just select the ZIP file and Visual Boy Advance will automatically load the ROM from it. Gameboy Emulation Visual Boy Advance can just like a real Gameboy Advance also play original Gameboy (Color) games. So there is no need to get a seperate emulator. Because of this the author has stopped development of his "normal" Gameboy emulator Visual Boy.