Best Open Source Software

This is a BOSS thread, let's see what turns out to be our favorite open source software. For me, it's definitely GIMP, the gnu image manipulation software. You can get it at http://www.gimp.org/

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>>2
What I really meant with this is that GIMP sucks, it's just that you've got an awful sense of humour. In fact, I shoud not had even add the spoiler to my post, as it's such common knowledge that gimp sucks donkey dickie.