Free of charge music apps (editing, notation, capture, compression, learning)

I thought it would be useful to have a one stop discussion thread on this as it was often discussed in the past over at PW.

I found this rather comprehensive database at C.Bechstein Digital:

Here are some of the apps I currently use.

Notation: MuseScore 3

Audio editing: Audacity

Transcription: Google Magenta - Onset and Frames

Audio demuxing/muxing/encoding: AVI Demux

burkey for the Concertino app they have written this in the blurb:

'… start no-nonsense radio stations and much, much more - for free!'

I'm not sure if the German->English translation is correct, however that is hilarious (although I suspect the intent was serious?!)

Can you still edit the title to "free"?
BTW, nice finding of repository...

QuasiUnaFantasia the downsides of upgrading to Android 12! Have to adjust to the new swipe keyboard!