Txt2regex is a Regular Expression wizard that converts human sentences to regexes.
In a simple interactive interface, you just answer to questions and build your own regex for a large variety of softwares and programming languages: AWK, ed, egrep, Emacs, expect, find, gawk, grep, lex, lisp, mawk, MySQL, OpenOffice.org, Perl, PHP, Postgres, Procmail, Python, SED, Tcl, VBscript, VI, Vim.
Already translated to 10 languages, it features support for POSIX classes, smart group balance control, metacharacters information table and regex automatic generation for frequently used patterns.
Geek note: txt2regex is a shell script 100% written with Bash builtin commands. No external command is used.
