ACH payments with Stripe - Accept bank payments with a few lines of code.
Chamath Abs Calculator - Calculate how long will you take to get SixPAC ab'ed
Wirize - Payment checkout for freelancers
Wakeout - A new way to wake up—with workouts you do in your pajamas
Giftbit Payment API - Stripe for gift cards
Ewolo - A simple, flexible mobile-friendly workout logger & tracker