PlayPlay.io - Chess and Ping Pong tracking in Slack
Ranked.Fun - An online leaderboard with your friends for your favorite games (Ping Pong, Foosball, Smash Ultimate, Chess, etc.)
Papio - Friendly foosball scorekeeper and stats tracker for Slack
PongUp - The ping pong leaderboard for awesome offices
Slack Poker Bot - A bot that turns Slack into a Texas Hold'em client
Pongbot - Slack bot for ping pong tracking.