Helm is a free, cross-platform, polyphonic synthesizer that runs on GNU/Linux, Mac, and Windows as a standalone program and as a LV2/VST/AU/AAX plugin.

Software type
ALSA
JACK
LV2 plugin
VST2 plugin
AU plugin
Platform
GNU/Linux
macOS
Windows
Software features
Software language
C++
License
GPL-3
Developer(s)
Matt Tytel (mtytel)

Recent releases:
Helm 0.9.0 9 Jul '17
Helm 0.8.0 17 May '17
Helm 0.8.6 17 May '17
Helm 0.4.0 3 Aug '15
Helm 0.3.2 3 Aug '15