Slack Meme Bot - Spice up your team conversations with memes
Music For Makers - Licensing good music has never been this easy.
GoGifApp - Free Slack GIFs App, multiple images to pick from at once
TunePocket - Download 11,000+ royalty free music tracks and sound FX. Buy once, use forever. New music added daily. Save over 50% compared to most popular similar services. Incredible value!
VixT on Slack - The best video mashup app now on Slack.
Incompetech - Royalty Free and Creative Commons Music Archive