TuxNES is an emulator for the 8-bit Nintendo Entertainment System that runs under Linux and FreeBSD on i386 machines. It supports a wide variety of graphic displays, sound modes, nifty features, and, of course, NES games.
Open source project that offer summary and download services on this page is a project that carry out their development work on other open source development sites. Their work is linked to this page via a feature called OFI, and their work is not carried out here on OSDN site.