Recently, I have had a few people ask me about the various CLI applications that I use and what I could recommend to them.

I figured I would post a list for those who are interested. I highly encourage those who read this to respond with other applications that they use which are not on this list .

Audio:

• abcde - A CD ripping frontend.
• aumix - A sound mixer.
• LastBASH - A Last.FM stream player.
• lltag - A music file tagger and renamer with CDDB support.
• MPD - The music player daemon.
• ncmpc - An ncurses-based client for MPD.
• Shell.FM - A Last.FM stream player.

Games:
(As per request -- I don't play that many as you see)

• bs - The game of Battleships.
• Lexter - A word puzzle game that resembles Tetris.
• NetHack - THE dungeon exploration game.

Internet:

• CenterIM - A multi-protocol instant message client that supports SSL and PGP encrypted messages. It is a fork of CenterICQ
• ELinks - A full-featured web browser (as much as a text-based browser can be :p).
• Irssi - A modular IRC client.
• Mutt-ng - An email client based off of mutt.
• OpenSSH - The secure shell server & client.
• podget - A simple podcast aggregator.
• rTorrent - A BitTorrent client that is based on libTorrent.
• Snownews - An RSS aggregator.

Honorable Mention -- Decent applications I have tried but don't use:

• Raggle - An RSS aggregator written in Ruby.
• WeeChat - A modular IRC client with a built-in nick list.

Miscellaneous:

• abook - An address book which works great with the mutt/mutt-ng mail client.
• BashBurn - An excellent cd/dvd burning shell script.
• GNU Screen - A manager that multiplexes a physical terminal between several processes.
• scrot - A screen capturing utility.
• Twin - Its full name is Textmode WINdow environment and it functions exactly as the name implies. It draws and manages text windows just like X11 does for graphical windows.
• vim - The highly configurable and much beloved text editor.
• vimdiff - Another handy vim tool that shows the differences between two or three versions of a file.

System:

• Dmidecode - Reports information about your system's hardware.
• GNU Midnight Commander - The midnight commander file manager.
• htop - An interactive process viewer that is superior to top.
• MultiTail - Think of it just like tail. However, MultiTail lets you view multiple files at once with syntax coloration.