puNES v0.66 is released. puNES is a NES emulator. Currently the program supports mappers 0, MMC1, UNROM, CNROM, and the sound is available. It uses the SDL libraries and it works on both Linux and Windows.

puNES v0.66 Changelog

Fixed some little bugs in the apu engine (sweep and triangle) and implemented the non-linearity and interaction between audio channels. Now (finally) the apu_mixer (http://wiki.nesdev.com/w/index.php/Emulator_tests) test roms works well in puNES (I hope).

Download: puNES v0.66 for Linux32
Download: puNES v0.66 for Linux64
Download: puNES v0.66 for win32
Source: Here