Danimal Cannon
Amazing chiptunes. Reminds me that I'm a total infant when it comes to this stuff.
Also recommended by triplebatman, Æro-ll, Abducted By Sharks and 11 others, Juggies, ARMCANNON, Bitman, Ineffable Decibel, Zelkedo, Crescent City Celtic Band, Lobos, Moonsoul, Yes, Mayhem, Metroid Metal and Vimana.