PitchEasy - The card game that lets you pitch over 80 million Ideas
Google Payment API - Enable an easy-to-use checkout experience for customers
Web Trumps - A nerdy card game all about startups
Giftbit Payment API - Stripe for gift cards
Pitch Cards - I've 99 problems and I'm ready to pitch one!
ACH payments with Stripe - Accept bank payments with a few lines of code.