Nintendo Entertainment System emu+roms [tntvillage.org]
It's a tar archive, just use winrar or 7zip to extract the files.
This collection contains every game ever made for NES, and an emulator.
The Nintendo Entertainment System (often referred to as the NES or simply Nintendo), is an 8-bit video game console released by Nintendo in North America, Brazil, Europe, and Australia in 1985. In most of Asia, including Japan, the Philippines, Taiwan, Vietnam, and Singapore, it was released as the Family Computer or simply, the Famicom. In South Korea, the hardware was licensed to Hyundai Electronics, which marketed it as the Comboy.
The most successful gaming console of its time in Asia and North America (Nintendo claims to have sold over 60 million NES units worldwide), it helped revitalize the US video game industry following the video game crash of 1983. It set the standard for subsequent consoles in everything from game design (the breakthrough platform game, Super Mario Bros., was the system’s first major success) to controller layout. The NES was the first console for which the manufacturer openly courted third-party developers.