Redmine

Redmine has all information to draw activity graphs for a project. It would be the same as
current "/projects/activity/<name>" but using a graph. The X axis would represent time. Ideally there could be

• one line/graph for each kind of activity (tickets, wiki, news...) the use could select what is displayed
• a 'total' graph summarizing it all

And, in a perfect world, it would even be possible to compare activity of different projects on the same graph :)