boneclipse-cvsgrapher
This plugin adds a new menu item to the Team submenu when you click on a resouce that is under CVS control, which opens a graphical editor in which you can view and move around the individual versions of the resource. A context menu in the editor allows you to reset the graph to its initial layout, and (if two and only two versions are selected) to open a compare viewer of different versions of the resource.
The graphical view also displays relationship lines between versions that denote a merge. This is only supported if you have properly tagged the appropriate versions (i.e. 'Source_*' and 'Merge_*').
Click here to download: http://www.bonevich.com/boneclipse-master/boneclipse-cvsgrapher/