ChatFrog - Simple chat room for Reddit subreddits
PlayPlay.io - Chess and Ping Pong tracking in Slack
Remotehour Embed - ‘Zoom’ embedded on your website
Pinpon - The ping pong bot for Slack
Now by Ekko - Embed a slack-like chat in a few minutes on your website
Ranked.Fun - An online leaderboard with your friends for your favorite games (Ping Pong, Foosball, Smash Ultimate, Chess, etc.)