In no particular order (well, alphabetically):

• Chick Corea
• Devo
• Enya
• Front 242 (newer, rather than older)
• Front Line Assembly
• Rush
• Tangerine Dream
• Tchaikovsky (especially the 1812 Overture performed by the Academy of St. Martin in the Fields)

While this isn't music, wilst coding, I also listen to Public Radio (e.g., NPR and PRI) quite a bit:

• All Things Considered
• Fresh Air
• Morning Edition (also on NPR)
• Talk of the Nation