+6  A: 

http://thornahawk.unitedti.org/equationeditor/equationeditor.php

Ben Hoffstein  2008-09-22 15:21:16
+2  A: 

Try the online LaTeX equation editor:
http://thornahawk.unitedti.org/equationeditor/equationeditor.php

Martin Cote  2008-09-22 15:22:09
Learn LaTeX, and you can then take your knowledge offline.
John Flinchbaugh  2008-09-22 15:24:37
A: 

http://smarth.sourceforge.net/

and implemented also at http://www.physicsforums.com/showthread.php?t=8997

Galwegian  2008-09-22 15:22:13
A: 

http://www.mr.ethz.ch/~majer/formula/formula.php

David Dibben  2008-09-22 15:22:58
A: 

I use the TeXer for creating images from LaTeX. It creates gifs with transparent background.

John D. Cook  2008-10-19 03:16:43
A: 

I use Roger's Online Equation Editor.

PNG, colors, transparent background and anti-aliasing are all included.

goodrone  2009-06-02 14:07:22

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