An anonymous reader writes
"I've been working on a financial application which I've decided to release to the public. I want to make some money from the application, though I certainly don't expect to become a millionaire. The problem is that I'd like nothing better than to open-source it. There are many aspects of the application that I don't have time to refine, and other developers could definitely improve upon my work. However, I don't know how I earn money from something once I've made it open source. How have you dealt with trying to turn a reasonable profit on your work while remaining open-sourced?"