Fender Tune - Free guitar and bass tune iOS app
Giftcard Zen - Buy a gift card at a discount
Tuner Eclipse - A simple and accurate guitar tuner for iOS
Wirize - Payment checkout for freelancers
Epoch - Simple, with easy all-inclusive merchant integration. Powerful, with automated international customization. Flexible, for the most unique and sophisticated demands.
Google Payment API - Enable an easy-to-use checkout experience for customers