The names that appear are from the developers who have made changes to the source code. The stars/highlights represent file commits made to the subversion repository. The histogram to the bottom left displays activity. Look out for the date displayed in the right bottom corner. Remember to Watch in HD!
The long void during 2006 correspond to our server switch from OpenSVN to l2jserver.com and the rest are from the code freeze period that we take before a new release launch. We have even found some lost scrolls containing our old CVS repositories.