Trello is a collaboration tool that organizes your projects into boards. In one glance, Trello tells you what's being worked on, who's working on what, and where something is in a process.
"Wiki of the Mother of Many Maps.
Here we collect and condense the diverse materials that have been accumulated in early 2014 on several different platforms like Etherpads, Trello, the Mailing Lists and intermediary Discourse Forums."