Here's an interesting enhancement for StarTeam and Araxis Merge:
This utility solves the problem that StarTeam doesn't surface any information (filename, path, revision number) about the files being compared to custom diff viewers. By replacing StarTeam's internal visdiff.exe with a custom application of the same name, we are able to get to the same information as StarTeam's visdiff.exe.
This tool was written by Anders Melander.