grepWin - grepWin is a simple search and replace tool which can use PCRE regular expressions to search for...
dnGREP - dnGrep allows you to search across files with easy-to-read results.
Extract Emails - Extract Email makes it so easy to create email mailing lists, catalogue contact information, and enjoy cross-platform accessibility.
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, ...
Cute Web Email Extractor - It is fast, secure and trusted web email extractor, email scraper, email grabber, and email spider for extracting email addresses from search engines, websites, local files.
The Silver Searcher - A code searching tool similar to ack, with a focus on speed.