I think this will help you with the video game section Vol. The wiki at the top of this list is a ton of games by 2D, 2.5D and 3D. The other wiki stuff is in the characters database under DoubleA's mugen character posts.
You'll find them interesting once you start reading. For instance the Touhou wiki. I found out that ZUN is a drunkard, No wonder the characters are so messed up.
I know Iam missing some official websites but they'll come to me in due time.