ZDoom 2.6.0 is now released, after not having an official release since 2010. Get it here. A list of new features can be found here, which includes swanky things like 3D floors and voxels.
Randy Heit has released ZDoom 2.3.0, over a year (and seven hundred SVN revisions) since the last offical release. Major changes include Chex Quest support, UDMF support, a new MAPINFO syntax, a new text based texture definition format, a switch from FMOD to FMOD ex which includes reverb for sound cards that don't support EAX, and more. Download it here.
Enjay has just released his latest mod, BGPA Missions - Burghead Liberation. It's a 5-map conversion that takes place in Enjay's own Aspects universe, where the player has to investigate an Inca Free Republic (the enemies from Enjay's previous mod, Operation Overlord) stronghold and see what they're hiding. You can get it either from Rex's Doom Nexus or from David Fersat's site. The mod requires GZDoom SVN revision 13 or above to run.