Keypirinha - A lightning fast and flexible keystroke launcher for Windows. No installation required (portable).
grepWin - grepWin is a simple search and replace tool which can use PCRE regular expressions to search for...
JREPL.BAT - Performs a global regular expression search and replace operation on each line of ASCII input from...
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, ...
ack - Ack is designed as a standalone (one perl file) replacement for 99% of the uses of grep.
dnGREP - dnGrep allows you to search across files with easy-to-read results.