Slack It - A bookmarklet to share links in Slack with one click
Playlistful - Collaborative playlists for parties!
Heymarket for Slack - Text and Facebook messaging from Slack
Pyro - Spotify music voting for parties
MovetoSlack - Migrate from MS Teams to Slack in 5 minutes
Party On Demand - Have a party delivered to your door in 60 mins or less.