productboard - Beautiful and powerful product management.

klaep - music collaboration - klaep is a social music collaboration network for musicians

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.

Pyro - Spotify music voting for parties

ProductPlan - Cloud-based product roadmap software solution

Playlistful - Collaborative playlists for parties!