The gamecube emulator for windows gets a new release but sadly source only:

Long overdue, here is, as promised, the source code to WhineCube. It is provided as-is, in hopes that it will be useful to other emulator authors.

If you have any questions or opinions, feel free to visit the forum or the IRC channel #whinecube on Efnet.

http://whinecube.emulation64.com/