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