RightGIF - Less noise, better GIFs. A better /giphy for Slack.
Parallel - Listen to music with friends over Spotify at the same time
GoGifApp - Free Slack GIFs App, multiple images to pick from at once
Slackbox - Spotify playlist collaboration through Slack
Camo - Use your iPhone or iPad as a pro webcam
Join My Playlist - Listen to music live together with your friends in Spotify.