External diff Tool is an Eclipse plugin that allows the launch of an external diff tool for file compares rather than the default built-in Eclipse diff tool. This plugin doesn't replace the built-in Eclipse tool. It only adds a new menu item to the GUI.
Really wish this worked when comparing to remote files (i.e. CVS repository). Still a handy tool that I use on occasion. I like that it becomes a new option and does not automatically replace the existing Eclipse diff.
It does not work in History or Team Views. Moreover, If my workspace folder and the project folder are different, this tool becomes useless in any view.
This tool does not work with the History tab with eclipse. Unfortunately not worth downloading and installing without this basic feature.