Couldn't remember this last night, found it just now:

http://www.rexv.org/

Really nice app

John Wheat spoke forth with the blessed manuscript:
>  Good Day,
> 
>  I am seeking help to memorize, utilize, and gain basic proficiency 
> with regular expressions and sed, grep, egrep searches and the like. 
> When I read something like \^{a-r}\ my brain for lack of a bettwer way 
> to say it believes this to be a ctl-d and stops all processing. So if 
> you have a tool or an acronym or perhaps a silly song you have made up 
> that would help me learn this aspect of CLI interaction would you please 
> share that information with me.
> 
> John Wheat
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