We maintain a piece of software called roadRunner which is a backend simulator used in a variety of software tools. It was originally written in C# by Bergmann and Sauro but this year we decided to rewrite it in C/C++ to broaden its appeal. Totte Karlsson is doing the rewrite which is now close to completion. In the process he used gource to record all the changes that happened in the form of a video as the software was redeveloped. Here is the video he made and some selected still shots.