The Envato PHP SDK by Morning Train is a complete native PHP wrapper for the Envato API. The Envato API allows developers to access and search Envato's market information, retrieve user details, get Envato market stats, and check on the Envato forums from their own applications.
Digitalfolio's API connects retailers up to its rapidly expanding comparison shopping site, currently focused on appliances and electronics, and more recently toys. With seven of the largest retailers on board, including Sears, Amazon, Walmart and Target, Digitalfolio is rapidly becoming a site retailers need to have their wares on.
Amazon has launched the Mobile Associates API. The API enables developers to monetize apps by offering physical and digital goods for sale through the Amazon marketplace and various Android stores. App owners can earn up to 6% in advertising fees for sales made through an owner's app. With the Mobile Associates API, Amazon aims to present a new way of monetizing apps by offering contextually relevant products for sale within any given app.