inkscape

http://jblevins.org/log/latex-in-inkscape

install: Pstoedit and Pdf2svg

Effects > Render > LaTeX formula

http://pav.iki.fi/software/textext/

On Linux, you'll need to have pdflatex and one of the following installed:

Installation

Pstoedit with its plot-svg back-end compiled in, or,

Pstoedit and Skconvert, or,

Pdf2svg (the one by David Barton & Matthew Flaschen, not the one by PDFtron)

If you have Inkscape 0.47, unpack the newest version of the Textext package and copy its files to ~/.config/inkscape/extensions/. If you have an earlier version of Inkscape, the correct location is ~/.inkscape/extensions/.

Note that Textext (starting from version 0.4), like the other Inkscape 0.46 extensions, requires that lxml is installed. (On Ubuntu, this is in the python-lxml package.)