Ardour has just seen a new major release, version 4. Since the last release, there have been over 4,000 commits.
Ardour has seen a lot of infrastructure work and now uses a new graphics engine (cairo) for the editor window. You can now also use other audio backends other than JACK, for example you could use ALSA, although JACK is still the recommended backend.
Rui Nuno Capela has been on a pre-LAC2015 release frenzy with his Q-stuff suite of software. In the past week he has released updates for QjackCtl, Qsynth, Qsampler, QmidiNet, QmidiCtl and of course Qtractor. You can find full details about these releases over at rncbc.org.
Version 0.9.5 of Giada Loop Machine has been released. This version, codename 'Nabla Symbols', has a number of refinements, as well as permanent MIDI mapping.
The DrumGizmo developers have just pushed out a hot fix release, version 0.9.8.1. This fixes a rather serious bug in the resampling code that would cause sample skewing over the channels when resampling was enabled.
The latest version can be downloaded at drumgizmo.org
Don't forget you can visit the official DrumGizmo IRC channel at the Freenode network.
Rui Nuno Capela has announced a fourth beta of his Vee One Suite of plugins, which includes an old school polyphonic synthesizer (synthv1), a polyphonic sampler (samplv1) and a drum-kit sampler (drumkv1).
The 2.5.0 Release of ZynAddSubFX is now available.
This release is mainly focused on fixing some of the core architectural flaws that have historically existed. As a result this release should behave much better under jack and interfacing with the realtime side of things is much easier now.
Drumgizmo v0.9.8 has just been released. Beside the usual minor bug fixes, there has also been a lot of work done on the command line version of Drumgizmo.