I created a free and open-source platform called NickelBot (
http://www.nickelbot.com) and the source can be downloaded at
https://github.com/AdamCox9/nickelbotI have an API available up at my website for trading and providing information about the exchanges and currencies. Here are the docs:
http://www.nickelbot.com/#docsAnybody can set-up the platform on their own server to build web apps and bots for trading and anything else they can think of. I'm also looking for PHP/JavaScript developers to help me continue improving the platform and adding new exchanges.