Doomsday 2.1 has been released (build 2900), coinciding with the 25th anniversary of DOOM!
This version contains several improvements for an all-around nicer experience:
Graphics optimization. While games still use the classic renderer like in 2.0, all graphics are now drawn using OpenGL 3.3. This enables optimizations for more efficient rendering of the player view, menus, text, and the Doomsday UI.
UI improvements. The Doomsday UI look and feel has been refreshed. The game library is now more flexible and powerful with further game customization settings and view options.
Multiplayer convenience. Clients will automatically download missing PWADs from the server before joining the game.