pv: a shell interface for pivotal tracker
At eLocal, we use the lovely Pivotal Tracker to track our work progress. It has a really great interface for viewing stories, and some additional features like tasks, rich text comments, and the ability to "predict" future iterations by using the velocity and "points" system (which is totally arbitrary). Another great feature is the story states, which are also arbitrary, but we use them for very specific purposes...for example, Delivered means the story has been placed on the stage server and is ready for testing, while Finished just means that I've pushed the code to master branch and it can be deployed at any time.