There is a new beta release of Vavoom, the most advanced source port for DOOM/Heretic/Hexen. It fixes most of the bugs reported in the Vavoom Forums, and also introduces EDGE 3D floors and line specials. You can get this latest beta release here.
A new Vavoom version (1.11.1) is out. This version includes some bugfixes for weapons and bots, plus an SDL port for Linux. The distribution also comes with a VavoomC scripting language documentation. Check out the Vavoom site for more info.
Korax Mod II, a new RPG mod for Hexen, has been just released. While keeping the enhancements of the original Korax Mod like 3D acceleration, all-new spells, RPG-like stats and experience points, it also introduces new elements like looting corpses for treasure, buying equipment in shops, new weapons, new spells and a Berserker mode for the Fighter. For more information, check out the Korax Mod II site.
SkyJake released the latest source code of the Doomsday engine (the engine driving jDoom, jHeretic and jHexen). See the jDoom, jHexen or the jHeretic site for more info.