I stumbled on eXPlainPMT in 2005 and began using it as a sandbox to learn rails. At the time, my role at Sabre was an agile mentor and we used a myriad of tools for managing our agile projects. I thought eXPlainPMT could be beneficial to many of our teams who were struggling with distributed teams using excel or other types of tools. After showing the tool to a few folks, the feedback was clear: "Its a good starting point but it doesn't do ..." My thought of course was "Yeah, but its free!" I forked the official version of eXPlainPMT and started incorporating all the requests from our teams in my spare time and the tool began filling out. I eventually became an owner on the official version and began merging my features into the main trunk. Sabre currently manages several hundred projects which include 10's of thousands of stories. Are there products that do more...yup. Are there products that are better at some pieces of functionality...yup. eXPlainPMT is for the team who wants something lightweight, very easy to use, web based, and of course....free.