visual search and replace tool using Perl Regex

 Regexxer is a nifty GUI search/replace tool featuring Perl-style
 regular expressions (PCRE - Perl Regex). If you need project-wide
 substitution and you're tired of hacking sed command lines together,
 then you should definitely give it a try.
 .
 The tool can be used to search files or contents inside of a file.