Pivotal Labs
We create great software. As the customer, you play the key role in the development process. Your involvement with the team shapes what gets done, when. You determine the backlog of features to be developed, and you determine their relative priority. You make those decisions informed by the relative cost of the features in your backlog, since you can see at any moment what the relative cost of those features is, in terms of points. Pivotal Tracker lets you rearrange stories to your heart's content, and always keeps you informed of the impact your choices make on the schedule, and by extension, on cost.http://pivotallabs.com/