here's some more<p><a href="http://www.fileformat.info/tool/regex.htm" rel="nofollow">http://www.fileformat.info/tool/regex.htm</a><p><a href="http://www.rexv.org/" rel="nofollow">http://www.rexv.org/</a><p><a href="http://www.txt2re.com/" rel="nofollow">http://www.txt2re.com/</a>
(this one's particularly good for your next acid session)<p><a href="http://brosinski.com/regex/" rel="nofollow">http://brosinski.com/regex/</a> for eclipse<p><a href="http://www.weitz.de/regex-coach/" rel="nofollow">http://www.weitz.de/regex-coach/</a><p><a href="http://regex.larsolavtorvik.com/" rel="nofollow">http://regex.larsolavtorvik.com/</a><p><a href="http://www.regexbuddy.com/" rel="nofollow">http://www.regexbuddy.com/</a><p>(this one costs a few $)<p><a href="http://www.regextester.com/" rel="nofollow">http://www.regextester.com/</a><p>(... and the one in activestate Komodo. i don't use any o these, i have my Friedl book and i try to understand the edge and cornder cases, build a test suite)