dnGREP - dnGrep allows you to search across files with easy-to-read results.
PuTTY - Popular free terminal application. Mostly used as an SSH client.
grepWin - grepWin is a simple search and replace tool which can use PCRE regular expressions to search for...
MobaXterm - Enhanced terminal for Windows with X11 server, tabbed SSH client, network tools and much more
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, ...
iTerm2 - A terminal emulator for macOS that does amazing things.