Well over 600,000 developers participate in a topcoder community that not only allows them to expand their development skills, but also gives them access to projects where they can get paid for participating.
The app55 API lets online and bricks and mortar merchants in the UK take payments from customers on any device, on websites designed and controlled by the retailer. app55 joins 362 payment APIs in our directory. In addition to offering one click, being fully brandable (meaning the customer sees your site only, and is not aware of app55's role), all of the stiff PCI compliance issues that make handling these transactions so complex is outsourced through them.
In May, TradeKing announced major enhancements to its open API. Now, TradeKing wants to see the API's functionality shine in creative new apps; TradeKing recently announced the TradeKing Financial Entrepreneur Pitch-Fest Competition.