Zelle - Zelle is a fast, safe and easy way to send money in minutes to your friends and family.
Codester - The marketplace for ready-to-use web development assets
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.
CodeCanyon - Scripts and Snippets From $1 for PHP, JavaScript, ASP.NET, CSS, Plugins, HTML5, Mobile and more
PaymentSpring - The all-in-one, developer-driven payment gateway
PieceX - PieceX is a new platform available for buying and selling source code. All Engineers, From beginner programmers to senior engineers can use the PieceX. It provides source code in many languages including Java, C#, PHP ....