graphical

Prime is a Network Design product from prime.sourceforge.net: Prime is a administration software that will allow easy, but detailed planning and drawing of an entire network with the capability to place, move and manipulate entities within the network map such as desktops...

tkdiff is a graphical diff viewer based on the Tk framework. It is capable of inter-operating with source-control systems like CVS and Subversion to show differences between a local copy and a repository version.