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Free Code Camp - Learn to code by helping nonprofits.

Tuio - Tuio is a billing and payment application that allow daycare centers and pre-schools to centralize and manage all parent billing and payment in one place.

Tuts Insider - Tuts Insider is a source for developers to learn web desgining, development and much more. Tuts Insider also provides 100s of examples.

Yusp - Yusp is a next generation, real-time personalization engine having all product modules as defined by Gartner for various business models.