Make It Rain - Random gifs when you get paid via Stripe (Slack and Hipchat)
PingPong UX - The easiest way to run remote user research. Test your product with users worldwide & create experiences they'll love.
Darts Club: PvP Multiplayer - Darts Club: PvP Multiplayer is an amazing player versus player gaming app with a collectible twist.
Testbirds - Testbirds is a crowdtesting platform with a community of 100,000 testers
Red Stamp Cards - Red Stamp Cards is a fabulous mobile app that facilitates its users to greet their friends and family with excellent paper cards and notes.
Mockito - Mocking framework for unit tests in Java.