CodeCanyon - Scripts and Snippets From $1 for PHP, JavaScript, ASP.NET, CSS, Plugins, HTML5, Mobile and more
Stripe - Online payment processing for internet businesses. Stripe is a suite of payment APIs that powers commerce for online businesses of all sizes. Use Stripe’s payment platform to accept and process payments online for easy-to-use commerce solutions.
Codester - The marketplace for ready-to-use web development assets
Wirize - Payment checkout for freelancers
CodeGrape - CodeGrape is an online marketplace for Themes, WordPress, Plugins, PHP Script, JavaSCript, HTML5, Mobile Apps, Print, Graphic and CSS files.
Giftbit Payment API - Stripe for gift cards