Google Payment API - Enable an easy-to-use checkout experience for customers
Sell My App - Sellmyapp is a top quality mobile source codes marketplace with strong community elements
Giftbit Payment API - Stripe for gift cards
Codester - The marketplace for ready-to-use web development assets
ACH payments with Stripe - Accept bank payments with a few lines of code.
CodeCanyon - Scripts and Snippets From $1 for PHP, JavaScript, ASP.NET, CSS, Plugins, HTML5, Mobile and more