The console Regular Expression Wizard
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.