in reply to
Regular Expression Builder
Komodo from ActiveState includes a regular expression toolkit that allows you to see what a regex does as you have it, on a sample output.
I know this is not exactly what you are looking for but it might be helpful...
Computer science is merely the post-Turing decline of formal systems theory.
I make decisions, and my brain carries them out
My brain makes the decisions, and I observe them (if I'm lucky)
I make some decisions, and my brain makes others
My spouse makes decisions and I and my brain carry them out
I wrote a program to relieve me and my brain from the burden of decision-making
The black-helicopter people project the decisions into my brain and then I do as ordered
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