asciiTeX is described as 'ASCII equation renderer released under the terms of the GNU General Public License. The program can generate ASCII-art representations of mathematical equations. You can use asciiTeX to quickly insert equations in e.g. e-mails or comments in your source-code' and is an app. There are three alternatives to asciiTeX for Windows, Linux and Mac. The best asciiTeX alternative is latex2rtf, which is both free and Open Source. Other great apps like asciiTeX are tex2mail and tex2unicode.
latex2rtf is a translator program to convert LaTeX formatted text files into “rich text format” (RTF) files. RTF is a published standard format by Microsoft. This standard can be ambiguous in places, but RTF is supported by many text editors.
tex2mail – Converts TeX to mailable "ASCII art"
Tex2mail is a perl script to convert TeX files into plain text files: various mathematical symbols (sums, products, integrals, sub/supers.
