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Trello is a simple, free and flexible way to visualize, manage your projects and organize all kinds of affairs, which is trusted by millions of people around the world. In the summer of 2010, Fog Creek Software began issuing regular Creek Weeks to develop potential products internally. In January 2011, a prototype machine to solve some high-level planning problems will appear. It's called Trellis. Soon thereafter, comprehensive development was launched. After close testing, Trello launched the Web and iPhone versions of its apps at TechCrunch Disrupt in September 2011. They carefully avoid names like Cardvark and Planatee matching names like their name. In the summer of 2012, Fog Creek co-founders Joel Spolsky's and dog Taco became their official spokesmen. They have 500,000 members and launched the Android application.