Eclipse Version Tree Plugin is an easy to use, graphical version tree for project artifacts hosted in a CVS repository. It is a graphical replacment for Eclipse resource history. Supports different layout styles, customization and convenience features. The development is being continued on GitHub https://github.com/angvoz/net.sf.versiontree
Yet Another Diff Tool
YaDT - Yet another Diff Tool. It is another front-end for diff and in earlier versions diff3 utility. With YaDT you can compare and merge 2 and/or 3 files. YaDT is written on Tcl/Tk and wrapped in a single executable file with the help of sdx and tclkit. diff and cvs utilities are embedded inside YaDT. Also, YaDT supports Git and Mercurial repositories, but git and hg are not embedded inside YaDT, you should have git/hg executable in your path environment.