AstroGrep is a Windows grep utility that supports regular expressions, context lines, and advanced search options.

DocFetcher is an open source desktop search application that runs on Microsoft Windows, Mac OS X and Linux.

FileSeek is a file search app that includes advanced functionality for power users.

grepWin is a simple search and replace tool which can use regular expressions to do its job.

PowerGREP is a powerful Windows grep tool for searching through files and folder, performing complex search and replace operations.

XSearch is a classic search tool with more features Windows Search does not provide.

BareGrep is a free file finding and text searching tool.

FileLocator is a file Searching Utility. Finding files that other search engines miss.

grep is a command-line utility for searching plain-text data sets for lines that match a regular expression.

Lookeen Desktop Search is a desktop search for Windows and Outlook tofFind documents, emails and more.

Searchmonkey is a cross-platform desktop search application available for Windows, recipe Linux, Mac and FreeBSD.