OOoFormulaEditor 1.0.0 is a StarBasic formula editor plug-in for OpenOffice.org Writer.
It will run in OOo 2.2 - 3.0 under Windows XP.

Using OOoFormulaEditor, you can create simple and complex formulae using a combination and nesting of mathematical equations and notations like fractions, nth roots, summations, products, integrals, limits, exponents, bases, systems of equations, matrices, binary/unary operators, relational operators, set notations and operators, grouping symbols, text attributes, greek characters and others.