AudioSet by Google - A massive dataset of manually annotated audio events
Planogy - A feedback platform for all the creative work
Sketchfab sound - Publish, share & embed 3D & VR scenes with positional audio
Airsketch - Simple screenshots + annotations for Mac 🖥️
Note Tracks - Annotated notes for audio content
FakeClients Feedback - 🖌 A simple, free to use platform for design feedback