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

tmux - tmux is a terminal multiplexer: it enables a number of terminals (or windows), each running a...

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, ...

GNU Screen - Screen is a full-screen window manager that multiplexes a physical terminal between several...

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

mtm - Perhaps the smallest useful terminal multiplexer in the world.