VixT on Slack - The best video mashup app now on Slack.
Meme Trends - Like Google Trends for Memes
Slack Meme Bot - Spice up your team conversations with memes
Meme Creator Bot - Create cool memes over a bot
GoGifApp - Free Slack GIFs App, multiple images to pick from at once
Mematic - Mematic – Make Your Own Meme is another free to use meme generator application developed and published by Trilliarden.