http://arbitrage.code4.us/
This is an evolving project that I've been working on. I needed a lot of non stagnant data to practice different technologies for work. One day I had the bright idea just to see if coins could be made from moving coins across exchanges. Short answer is yes the long answer is it involved way more work than I wanted to put in at the time. I plan on making a few updates to it periodically but right now the price updates are almost real time. If you have any suggestion feel free to let me know.