DOS port with editing features and a number of bug fixes. Compiled and source downloads and a feature list available.

Port for deathmatch play on the Internet. Offers downloads for Windows, FreeBSD and Linux, and a discussion forum. No longer maintained.

Port of Doom to a Nokia cellphone

Windows port with Direct3D and splitscreen capabilities. Also supports full 3D stereoscopic effect.

Perform Unix administrator tasks with a Doom interface.

Home of the Doomsday Engine, jDoom, jHeretic and jHexen.

DOS port based on MBF, with various extra features particularly for Dehacked work. Binaries, source code and editing demonstrations available.

A port to Linux and the GGI library, that includes high resolution graphics. No longer maintained.

Engine with new features for enhanced deathmatch games, available for most major platforms. Contains discussion forums, development news, documentation, and links to derived engines.

Port to Windows NT, no longer developed. Binary and source downloads.

DOS port, no longer updated. Source and binaries available.

A port for Windows and Linux that closely emulates the original game.

A process monitor and manager for *nix systems, using Doom as an interface.

Brief information about the Marine's Best Friend Doom engine, for DOS.

Windows port with higher resolutions and a console. Program download, source code, documentation and a front end available. Not updated.

Doom engine for Windows with new editing features. Site contains compiled and source downloads, development news, tutorials for the new features and a discussion forum.

OpenGL port for Windows. Binary and source code downloads, and a discussion forum.