grepWin - grepWin is a simple search and replace tool which can use PCRE regular expressions to search for...

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

DocFetcher - DocFetcher is a portable German/English open source desktop search application.

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, ...

dnGREP - dnGrep allows you to search across files with easy-to-read results.

Agent Ransack - Agent Ransack is a tool for finding files and information on your hard drive fast and efficiently.