Chat Bots Weekly - A weekly curation of everything important in chat bots
PlayPlay.io - Chess and Ping Pong tracking in Slack
ChatBottle - Chatbots Search Engine
Pinpon - The ping pong bot for Slack
BotList - An app store for bots
Ranked.Fun - An online leaderboard with your friends for your favorite games (Ping Pong, Foosball, Smash Ultimate, Chess, etc.)