If you are looking for somewhere to craft regexes, someone recently posted a link to a neat looking project, regex101 <a href="http://regex101.com/" rel="nofollow">http://regex101.com/</a> .<p>This link looks to be driving traffic to this myezapp.
Pretty cool. One minor bug: it says "repeat" for "?", but then for the number of times it says "optional". It really shouldn't say "repeat" at all for that character.
Pretty nice. It could deal with weird java specific stuff like for example \p{javaWhitespace} - it deals with \s by saying it is "any whitespace", but it seems to think \p{javaWhitespace} is a character sequence, rather than an odd java-specific character class.
It seems to choke on this mess of a regex:<p><a href="http://www.ex-parrot.com/pdw/Mail-RFC822-Address.html" rel="nofollow">http://www.ex-parrot.com/pdw/Mail-RFC822-Address.html</a>