Bandlab - Capture, nurture, and collaborate on song ideas in the cloud
Nawvel - Nawvel is a handy-dandy library of tried, tested & curated resources.
Music Memos by Apple - An app to capture your song ideas
The Starter Kit - Curated resources for web developers and visual designers
Amper Music - Artificial intelligence music composer
Makerbook - A directory of the best free resources for creatives