Legacy - Engine with new features for enhanced deathmatch games, available for most major platforms. Contains discussion forums, development news, documentation, and links to derived engines. PrBoom - A port for Windows and Linux that closely emulates the original game. WinDoom - Windows port with higher resolutions and a console. Program download, source code, documentation and a front end available. Not updated. Doom3D - Windows port with Direct3D and splitscreen capabilities. Also supports full 3D stereoscopic effect. NTDoom - Port to Windows NT, no longer developed. Binary and source downloads. Fusion - DOS port based on MBF, with various extra features particularly for Dehacked work. Binaries, source code and editing demonstrations available. Client/Server Doom - Port for deathmatch play on the Internet. Offers downloads for Windows, FreeBSD and Linux, and a discussion forum. No longer maintained. ZDoomGL - OpenGL port for Windows. Binary and source code downloads, and a discussion forum. What Is MBF, Anyway? - Brief information about the Marine's Best Friend Doom engine, for DOS. psDooM - A process monitor and manager for *nix systems, using Doom as an interface. ZDoom - Enhanced port for Windows. With compiled and source downloads, development news, tutorials for the new features and a discussion forum. Eternity Engine - A Doom engine port based on Smack My Marine Up (SMMU). Includes scripting, portals, polyobjects, and Heretic support, and will power the upcoming Millennium and Mordeth TC modifications. Software rendering. (GPL) [Windows] Freedoom - Volunteer project to create a free version of Doom data files (WADs). These can be used with any Doom engine. (3-clause BSD) Doomsday Engine - Presents the engine and offers downloads, links, and forums.