[Inkscape-devel] Inkscape helper apps.

I am asking this question on the devel list because those who know the answer are likely to hang out here.

I know the helper applications like Scribus, Gimp, TeX and Java are needed to use the full power of Inkscape: Scribus for CMYK conversion, Gimp for extended manipulation of bitmap images, TeX for the Latex extension, and Java to support Jessylink. Am I missing any helper apps here? I would include both those called by Inkscape itself and those external to Inkscape but also considered very helpful. What about Imagemagick, Ghostview etc? Since I use Slackware linux I have a pretty complete set of helpers already. But what about the Windows and Mac users?