Calling SRT and Vobsub subtitles "DivX subtitles" is a misnomer. They have nothing to do with the DivX;), Divxlabs or XviD video codecs. More importantly, the term "DivX subtitles" stands for something else: an obscure proprietary bitmapped subtitle format by Divxlabs (Divxnetworks), aka XSUB (fourcc=DXSB), and to my knowledge there are no tools available to rip or convert from this format to anything else.
An open, cross-platform journaling program.
A scientific plotting package.