We just ran the excellent Gource tool over the Narayana repo and generated this rather neat visualization of our contributions over the last few years.
Software projects are displayed by Gource as an animated tree with the root directory of the project at its centre. Directories appear as branches with files as leaves. Developers can be seen working on the tree at the times they contributed to the project.
If you want to see your avatar on the video next time we generate one, please do consider adding a contribution over here: http://github.com/jbosstm/narayana