1) Instant messaging client 
GroupMe is a mobile group messaging app owned by Microsoft. It was launched in May 2010 by the private company GroupMe. In August 2011, GroupMe delivered over 100 million messages each month. By June 2012, that number had jumped to 550 million. == History == GroupMe was conceived at TechCrunch Disrupt 2010. Founders Jared Hecht and Steve Martocci ...