What are some alternatives?
When comparing grepWin and Atomic Email Hunter, you can also consider the following products
AstroGrep - AstroGrep is A Microsoft Windows GUI File Searching (grep) utility.
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, ...
grep - grep is a command-line utility for searching plain-text data sets for lines matching a regular...
Batch RegEx - Replace, format, and extract text in multiple files using Regular Expressions.
dnGREP - dnGrep allows you to search across files with easy-to-read results.
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.