I think even more important question is "what essential dev tools you've purchased that had some sort of open source equivalent".
As for me, last thing I remember – I've purchased http://theolabrothers.com/sip/ when is wasn't free. And it is just a simple tool I don't require at all (any image editor can be used instead), it is just much more convenient than any other alternative.
vgrichina|12 years ago
As for me, last thing I remember – I've purchased http://theolabrothers.com/sip/ when is wasn't free. And it is just a simple tool I don't require at all (any image editor can be used instead), it is just much more convenient than any other alternative.