Sparrow was an email client for OS X and iOS. Google acquired and then killed it. Launched February 9, 2011; shut down October 5, 2012 — it lived 1 year. One of 23 Google products killed in 2012. Sparrow is a discontinued email client for OS X and iOS. After a 4-month beta period, Sparrow went on sale in the Mac App Store on February 9, 2011 and became the top paid and top grossing app in less than one day. On July 20, 2012, the company announced that it had been acquired by Google and was ceasing continued development of the application except for critical bug fixes. Wiki link Data: Killed by Google (killedbygoogle.com, MIT).