Flat
Flat focuses on editing and sharing sheet music in the browser.
What it does
Flat lets people write scores in a browser and share them.
When to use it
Before choir practice, share one score for singers to review their parts.
Visit Flat official site
Amped Studio
Amped Studio focuses on browser-based recording and multitrack production.
Ardour
Ardour focuses on recording, composition, and mixing workflows.
Audacity
Audacity focuses on waveform editing, recording, and audio effects.