We’ve got a thread on good GUI applications, so why not one for CLI ones? I use the terminal a lot, for ssh-ing and weechat and whatnot. But right now, I’d say the following are my favorite CLI applications:
TaskWarrior
TimeWarrior
ranger
cmus
htop
mpv
nano
weechat
screen
tmux
zsh
bombadillo (https://bombadillo.colorfield.space/)
lynx
Check out “bpytop”:
Also awesome:
ncdu (ncurses-based disk usage utility, sort of like Gnome’s “Disk Usage Analyser”)
mc is bae
I prefer glances over htop.
I also like nethogs, as it lists top bandwidth consumers by process.
But, the terminal app I use the most has to be Vim.
nmap is another favorite. This tool can be used for so many different purposes.
newsboat
nvim
ssh, sshfs & bindfs (cu cu cu cu combo breaker!!)
wget & youtube-dl
xrandr, wmctrl & xdotool
calcurse
gdebi and Aur!
fzf, weechat, ranger, exa, awk, grep … trying ripgrep, nmtui, neovim, ytop
I thought we had one similar thread but it was not cli only. So I will make it brief.
The terminal apps I use every day are like already mentioned by @Ulfnic newsboat as my RSS reader and youtube-dl. 
Then come vim and htop, yes htop, I really do not care about the other ones. 
And of course to watch all the documentaries and podcasts I downloaded with youtube-dl, including almost all of the DLN shows, I use mpv.
I don’t know what ‘bae’ means, but mc is great.
I don’t know what ‘bae’ means…
Name checks out. 
For the record, I had to ask a teenager myself.
thanks for the tip on ‘ask a teenager’.
For anyone who is as clueless as me, ‘bae’ stands for ‘before anyone else’ (according to this website).
pianobar. Make sure you set /etc/libao.conf to pulse.
Not to be confused with Xbae
A Motif® table widget which presents an editable array of string data to the user in a scrollable table similar to a spreadsheet.
apt install libxbae4m
ls (listing)
grep (sorting)
ping (testing connections)
speedtest (testing connections)
bible-kjv (quick referencing)
links (quick referencing)
and… NANO!!! 
Favorite apps are, Ramboxpro. Bibletime, GDebi. way better packaging system.
Oh… and now that I’ve discovered ‘tldtr’, this one gets added to my list! What a terrific plain-lingo way of researching how to use CLI commands! I absolutely love it!
Damn, I had no idea. I thought maybe it meant boyfreind. Oh, well, get of ma damn lawn you kids.
lsd > exa / ls
tealdeer > tldr
bat > cat
dust > du
gobble > swallow / devour
df - disk space check
viu - image viewer (best used in kitty)
goto - like bookmarks for cli
cpulimit
