30 Under 30 2011: Cool Companies' Apps

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GroupMe, Jared Hecht and Steve Martocci

Texting one friend at time is annoying, not to mention rough on your thumbs. This mobile app allows users to communicate with a select group of friends via group messaging and conference calling. GroupMe is free and works on iPhone, Android, and Blackberry—or it can be used with plain ol' SMS as well. Read more.