Kanban was an open-source project management app that gave a clear overview of a team's upcoming, current and recent tasks. It looks nice because Holly Tiwari designed it, but the project was abandonned as soon as Trello was released.

MacBook on a desk surrounded by notebooks and espresso cups. The MacBook displays a Kanban board of 10 tasks split across 5 columns: backlog, development, QA, deploy and done.
Tasks and user photos were 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.