It's probably the best time ever to be a developer: hardware is cheap; development tools are mostly free; computing capacity is available on demand; new app paradigms are emerging. Thing is, after you built it, how do you profit from it? In this session I'd like to talk in detail about the marketplaces that emerged in the last years, including Apple's App Store, the Android Market, the Google Apps Marketplace and the Chrome Web Store. Costs, legal hurdles, scary technical details, what works and what doesn't. Tales from the trenches.