I do a lot of my game development for my own enjoyment, or for my friends and family. I have no interest in attempting to sell a game. If anyone else is in the same boat, then here's an awesome resource for artwork. Bannedstory, a MapleStory artwork exporter (probably not an accurate name).
Character creation, with oodles and oodles of customization features, mobs, tiles, and all the other art assets found in MapleStory. It can export all animations for easy importing into C2 and creating animated sprites.
However, keep in mind, it would be for your own personal use, and would most likely violate copyright if you attempted to sell you game using these assets. Most people use it for creating machinima flicks or animated signatures, etc... But as I said, I find it very very very useful for my own "personal" projects.