Keypirinha - A lightning fast and flexible keystroke launcher for Windows. No installation required (portable).
ripgrep - ripgrep combines the usability of The Silver Searcher with the raw speed of grep.
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.
Gawk - The awk utility interprets a special-purpose programming language that makes it possible to handle...
AstroGrep - AstroGrep is A Microsoft Windows GUI File Searching (grep) utility.