^txt2regex$ is a Regular Expression Wizard that converts human sentences to
regexes. In a simple interactive console interface, the user answer
questions and the program build the regexes for more than 20 programs, like
Vim, Emacs, Perl, PHP, Python, Procmail and OpenOffice.org. It is a Shell
Script 100% written with Bash builtin commands.

WWW: http://txt2regex.sourceforge.net/