klaep - music collaboration - klaep is a social music collaboration network for musicians
productboard - Beautiful and powerful product management.
Madsounds - It’s like Discover Weekly, but daily.
ProdPad - ProdPad helps your team gather ideas, surface the best ones and turn them into product specs, and then put it all on a product roadmap.
MisterJack - Make and share playlists
ProductPlan - Cloud-based product roadmap software solution