What tools are available for generating typesettable pictures?
Only a few: asy, dot, dotty, epsutil, gimp, gpic, mpost (TeX Live and GNU/Linux only), xfig (and its companion fig2dev), skencil), tgif, and xpaint. On some Windows and Mac OS systems, we have the commercial Adobe Illustrator, Adobe Photoshop, Adobe Streamline, Corel Draw, and Corel Trace. The Maple, Mathematica, Matlab, R, SAS, and S-Plus systems can all produce a wide variety of types of plots. pdftex and pdflatex can handle input of images in JPEG, PDF, and PNG format. They cannot handle PostScript images. PostScript DVI drivers for tex and latex can handle PostScript images, but not PDF or bitmap image files.