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. No compilation or extra commands are needed, just download and run.

 http://txt2regex.sourceforge.net/