Yes, another handy tool for people who knows how to edit equations in LaTeX. Ekee, was named eqe, is a equation editor let user produce pretty equations interactively. Furthermore, you can drag and drop the equation to some other supported applications such as OOo Impress.
You can save the result like this:
It is also possible for you to reopen this equation, even saved in png file, with ekee for further editing or modification.