Shell
Omaterm runs on bash, but comes with a host of helpful tools to make the most of it.
fzf
fzf gives you fuzzy finding of files via the ff alias. Go to any directory, type ff, and you'll be able to fuzzy find your way to any file in that tree, while seeing a preview of the files you're narrowing down on the right-hand side.
You can use Ctrl + R to use fzf to fuzzy find through your command history.
This tool is also used by Neovim when you type Space Space.
Zoxide
Zoxide is a replacement for cd. It remembers the directories you've been in, so you can more easily jump to them next time. Say you do cd ~/Work/basecamp once. Next time, you can just do cd basecamp (or even just cd base), and Zoxide will take you directly there.
eza
eza is a replacement for ls. It gives you directory listings with more information, color, and icons. By default, eza has been aliased as ls. You can also use lt to get a listing of two-deep levels of nesting. lsa gives you a listing including hidden files. And lta a nested listing with hidden files.
btop
btop lets you see system load in terms of processes, network, and CPU in a single TUI. It's configured with TTY coloring, so your client live themeing will match correctly.
tldr
tldr provides the short'n'sweet version of what man normally gives you. Great way to checkout the essentials, like tldr fzf or tldr eza to learn about these shell tools.