Pics.io - Pics.io is a cloud service that people can use to manage their creative content and files, collaborate with their peers on this content, and then share it with their clients. Read more about Pics.io.
Magic Playlist - Get the playlist of your dreams based on a song
Photostash - Automatically save your pictures from Slack to Gdrive
Spotalike - Spotify playlist with similar songs, according to Last.fm
Invision - Prototyping and collaboration for design teams
Spotify - Map shows when two people play same song at same time