Graphical editor software for many Boss and Roland effect & synth unit
Free open source speech synthesizer for Russian and other languages
Virtual Pipe Organ Software
wxMP3gain is a free front-end for the MP3gain.
Audio Share can share Windows/Linux computer's audio to Android phone
Audio converter and CD ripper for various formats
Multi-Format Audio-Encoder Front-end
https://blackhole-apk.com/
MuldeR's OpenSource Projects
Multiplatform GUI of MP3Gain which adjusts volume of MP3 files
An old-school polyphonic synthesizer
An old-school polyphonic sampler
JACK Audio Connection Kit Qt GUI Interface
An old-school drum-kit sampler
Turn your PC into a very advanced MediaCenter/HTPC