QMath is a simple batch processor that produces an OMDoc file from a plain Unicode text document. In this aspect, its usage resembles TeX.
It works in many POSIX-style systems (tested on Linux and MacOS X), and in Windows with Cygwin.
[table> [tr>[td>1<>2<>3<]<] [tr>[td>a<>b<>c<]<] <]
These screenshots show Emacs 21 being used with "qmath-mode.el". (See the file README.EMACS in the source package for how to install it)