Game Creation
An article about rapid game creation:
http://www.gamasutra.com/features/20051026/gabler_01.shtml

Some simple tips for asset creation:
http://www.gamedev.net/reference/art/features/CoderGameArt/

LudumDare 48 hour game competition site
http://www.ludumdare.com/compo/category/ld13/?tag=final+final

Tools
Dr. Whitehead's CMPS 80K class tools (Game Maker Pro, RPG Maker, music/sound resources)
http://www.soe.ucsc.edu/classes/cmps080k/Winter08/tools.html

Ambrosine's Game Page (many engines, systems, graphics tools, most free but some for pay)
http://www.ambrosine.com/resource.html

Game Creation Software on Wikipedia
http://en.wikipedia.org/wiki/Category:Game_creation_software