For companies conducting even a small percentage of their business transactions online, e-commerce code is nothing to be trifled with. On that job is independent developer Sean Schofield with Spree, a fully baked, open source e-commerce system and development community built from the ground up to be easy to maintain and customizable as heck. Built with the developer-friendly Ruby on Rails, the turnkey solution even includes code for automated regression testing to help prevent bugs following feature enhancements and changes. Spree is completely free to use and includes all features for all users, regardless of company size. The community gets a cut of the transaction processing action and is also paid for support.