ReWork

37signals is a privately held company founded by Internet trailblazers, Jason Fried and David Heinemeier Hansson, committed to building the best web-based software products possible with the least number of features necessary. Their products -- Basecamp, Backpack, Highrise, and Campfire -- do less than the competition...intentionally. Since 1999, 37signals has grown into a multi-million dollar company with three million fanatically loyal customers. The company has been profiled in the Guardian, Time, Wired, and Business Week. They are based in Chicago.