SEOClerks - The largest SEO Marketplace on the planet. - SEOClerks
PlayPlay.io - Chess and Ping Pong tracking in Slack
Picoworkers - Earn money from doing short, easy tasks similar to Microworkers. Picoworkers is the best alternative to Microworkers I ever find.
PongUp - The ping pong leaderboard for awesome offices
SerpClix - SerpClix is a click exchange network used to send more real clicks to your Google SERP. You can click to earn money or buy clicks to rank higher on Google.
Pongbot - Slack bot for ping pong tracking.