ODAMEX v0.5.1 is released. ODAMEX is a modified Doom source port. Supported platforms are Windows, Mac, Linux and FreeBSD. It has been designed to allow client/server-based Doom gameplay over the Internet and LAN. It currently supports the traditional old-school style of Deathmatch and a Cooperative mode, but it also includes other game modes such as Teamplay and Capture the Flag. It also supports an array of editing features, including the BOOM map format, DeHackEd and BEX patch support and support for several additional music formats, such as MOD and OGG.

ODAMEX v0.5.1 Changelog:
General Odamex Changes:
* Fixed DirectX palette issues on Windows Vista/7
* First pass of zdoom map support including acs, mapinfo (classic)
* Scoreboard fixes
* Higher resolutions supported
* Various bug fixes and more

Odamex Xbox Changes:
* Chat macro support
* Fixed a bug that makes retrieving/refreshing the server list many times faster on affected Xbox's.
* Fixed DEH/BEX patch loading (mods like Batman Doom and GoldenEye load correctly)
* The player color sliders are now usable
* The launcher loads Odamex properly when it uses a long path name
* odamex.xbe can be launched directly from an XBMC shortcut with command-line parameters using the tag
* Various other bug fixes

Download: ODAMEX v0.5.1
Source: Here