Hi, as already written, I've setup a test instance of gerrit[1] (The GIT based review and repository management tool) on my server: http://koch.ro:8080
[1] http://gerrit.googlecode.com/svn/documentation/2.1.6/index.html However if you like, you may get a better impression of gerrit by looking at the installation at eclipse: http://egit.eclipse.org In particular, I've found an example of a patch with several versions: http://egit.eclipse.org/r/#change,1320 In the diff view you see "patch history" in the upper left corner. There you can select to view the diff between two different versions of the patch. (Disclaimer: I'm just advertising gerrit as an interested individual. There isn't any decision from infra@a.o yet.) Best regards, Thomas Koch, http://www.koch.ro