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ContestMachine is a web service that makes running promotions from any website easy. The service allows clients to run a contest or giveaway from their blog or website and handles the rest of the details, like collecting submissions and contacting winners. The service also allows clients varied options, like choosing entry requirements, start and end times, and the addition of prizes.

Popcuts is a unique online music store. DRM-free songs are sold for 99cents, but every time a song you bought sells, you get a cut of the proceeds (earlier buyers get a bigger cut).