Extract Emails - Extract Email makes it so easy to create email mailing lists, catalogue contact information, and enjoy cross-platform accessibility.
regexxer - regexxer is a nifty GUI search/replace tool featuring Perl-style regular expressions.
Atomic Email Hunter - Atomic Email Hunter is an incredibly robust tool that specializes in extracting email addresses, along with usernames, from various webpages.
PowerGREP - Quickly search through large numbers of files on your PC or network using powerful text patterns to find exactly the information you want. Search and replace with plain text or regular expressions to maintain web sites, source code, reports, ...
GitHub Email Finder - Find the email of any GitHub Developer using their GitHub username.
dnGREP - dnGrep allows you to search across files with easy-to-read results.