The latest version of D2X-Rebirth is 0.57. Changes and additions from the previous version include:

OpenGL ES Support by Florian Feucht and Oliver Haag
Anisotropic texture filtering
Improved transparency effects
Colored Lighting effects
A wide collection of Reticles is selectable including settings for Reticle size, color and transparency
Expanded Sensitivity and Deadzone settings for Mouse and Joystick
New optional control type for Mouse – FlightSim. Provides Mouse movement with an absolute center similar to Joystick-like control
Improved weapon cycling/selection options (for Mouse mostly)
Many improvements for the ingame menus such as scrolling via Mouse wheel, closing menus via right Mouse button, key repeats, Numlock support and more
Support for keyboard layout-specific keys for game controls
Find and join online games via Tracker server created and hosted by Matt “1360″ Vandermeulen
D1X-Rebirth now supports Descent 2 Multiplayer features such as fixed Play Time, Kill goal, Bright Players and Invulnerability when respawning
Option to disable Friendly Fire in Multiplayer Team games
Bounty game mode for Multiplayer by Matt “1360″ Vandermeulen. Goal is it to kill the targeted player to score and become the new target
Possibility to save and restore Cooperative games
The game will automatically remember previously set Multiplayer rules
M3U Playlist support for the Jukebox
Random playback mode for the Jukebox
Slightly improved wall collision handling
Expanded possibilities for level authors: Support for custom descent2.ham inside missions (D2X-Rebirth). Support for Levels with up to 9000 segments (cubes). Support for Textures bigger than 64×64 pixels
To prevent type-kills the game HUD will show “TYPING” below a player when a chat message is composed
Free flight controls for the Automap
Many Bugfixes and further improvements. Check CHANGELOG.txt for a full list of changes

Download: http://www.dxx-rebirth.com/download-dxx-rebirth/