Trello was launched on Android recently, offering yet another way in which folks could keep track of multiple projects and collaborate with others. There’s a set hierarchy where boards have lists, and lists have cards. Cards can be thought of as individual tasks as part of a particular project, while boards are larger categories encompassing multiple projects.
Cards can be assigned to individual users by e-mail (though only from the web, not from the app), complete with due dates, check lists, labels, attachments, and collaborators. Those cards can be moved, copied, subscribed to, voted on, or archived once complete. An activity stream of you and collaborators on any given board makes it easy to stay up to date on who’s been doing what, though you can also subscribe to individual cards to keep tabs on task progress.