Kanban is a project management app that gives a clear overview of the upcoming tasks, who is currently working on what and what has recently been deployed. It's pretty because of Holly, but the project was abandoned when Trello was released.
Tasks and user photos are drag'n'droppable. See the progress of a task with color indicators. The limit of a column gets highlighted when there are too many tasks being worked on, to help the team focus on shipping.