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Los Angeles (CNN) -- Blogging and tweeting might be among the last hobbies you'd list for a homeless person, but some down-and-out people have embraced social media in such a way that it's actually garnered them needed assistance -- everything from food and diapers for children to counseling and housing.

The best social network you've (probably) never heard of is one-five-hundredth the size of Facebook. It has no video chat feature, it doesn't let you check in to your favorite restaurant, and there are no games. The company that runs it has just four employees, one of whom is responsible for programming the entire operation.