AmpShell - AmpShell is a DOSBox front-end for Windows.
Retrostic - Free ROMs download for GB, GBC, GBA, NDS, N64, NES, SNES, Sega, Atari and more. No hidden viruses, just download your ROM and ISO files and play them using an emulator.
Terminal Launch V - For those that want a clean, simple fast emu frontend.
Roms Mania - A working online resource for roms.
DBGL - DBGL is a free, open source, multiple frontends for DOSBox.
CoolROM - Download from the largest and cleanest ROMs and emulators resource on the net. Mobile optimized. Systems include N64, GBA, SNES, NDS, GBC, NES, MAME, PSX, Gamecube and more.