FCEUX is a free, open-source Nintendo Entertainment System (NES) and Famicom (Japanese NES) emulator for Windows, Linux, Mac OS X, and Android. It is considered one of the most accurate and popular NES emulators available. FCEUX has a wide range of features, including support for cheats, debugging functions, and advanced video filters. It also offers a wide range of customization options and a library of homebrew games. Additionally, FCEUX supports online play and the ability to connect with other players. FCEUX also supports multiple ROM formats, and it is compatible with both original and modern controllers.
Discontinued The project is no longer being developed. The latest version, 1.40, released in June 2008, can still be downloaded from the official website.