At the moment, I'm using
mimetex to automatically convert a bunch of equations into gif-images.
The program is fast, but the images look pretty bad:
How can I (quickly) convert a LaTeX equation into an SVG image on the command line?
pdf2svg works quite well.
Have you tried ekee? It's a clone of LatexIt for Mac, it's great! It's hosted on http://rlehy.free.fr/.