Slack Meme Bot - Spice up your team conversations with memes
Koel - A personal music streaming server that works.
GoGifApp - Free Slack GIFs App, multiple images to pick from at once
Free Music Downloads - Stream and Download millions of trending songs for free.
VixT on Slack - The best video mashup app now on Slack.
Mood Listener - Handpicked playlists to fit your mood.