NesEmu2 Git (2013/06/10) is released. NesEmu2 is an nes emulator supporting more accuracy and better compatability than the original nesemu.

NesEmu2 Git Changelog:
- fixed all projects/makefiles to work.
- (possibly?) fixed osx.
- able to recognize mmc1a/b/c.
win32 dialogs updated with more functionality.

Download: NesEmu2 Git (2013/06/10)
Source: Here