Would be cool to be able to use kdiff3 to also check directories for differences even when they contain e.g. image files.
kdiff3 already can compare binary wise, so I can already see if any images (in my case PNGs) are different, but when I then only see the list of different images, it would be nice when I could directly start an external program to show me the actual difference between the two images (e.g. I created my own pixel difference program).
This mechanism of course should work for any type of file, so I should be able to configre an external diff tool per file type.