Noteqor - Note-taking templates made for designers
AMPLI.FI - Live online music community. Twitch for tunes.
Nute - Super simple one page note taking app
Bandlab - Capture, nurture, and collaborate on song ideas in the cloud
Notebag - A keyboard-focused note-taking app that gets out of your way
Blattarco - Creative self-developement for musicians of all level.