Mike Harrington is an American computer programmer, who is best known for being the co-founder of the video game development and digital distribution company, Valve Corporation. Previously a game programmer at Dynamix and a designer on the Windows NT operating system at Microsoft, Harrington founded Valve in 1996 with Gabe Newell, another former Microsoft employee. He and Newell privately funded Valve for the development of Half-Life. Harrington returned to the software industry in 2006, when he co-founded Picnik with long-time friend and former colleague Darrin Massena, which was later acquired by Google in March 2010. Harrington left Google in March 2011.