Interesting shell scripts and helpers

I have come across several shell scripts that are very very interesting.
First off are the scripts that make using fzf really useful:
https://github.com/atweiden/fzf-extras
https://github.com/lincheney/fzf-tab-completion

Then the ones for when you are writing a shell script:
https://www.shellcheck.net/
https://github.com/anordal/shellharden

Ones that can help you from making a mistake using a terminal command:
https://github.com/kaplanelad/shellfirm
https://github.com/nvbn/thefuck


While not pertaining directly to shell script tmux-plugins:
https://github.com/tmux-plugins/list
https://github.com/tmux-plugins/tpm

Another useful item is Onelinerhub
https://onelinerhub.com/
https://github.com/Onelinerhub/onelinerhub
https://github.com/Onelinerhub/shellhub

crontab-ui - Easy and safe way to manage your crontab
https://github.com/alseambusher/crontab-ui

cheatsheets:
Tmux Cheat Sheet & Quick Reference https://tmuxcheatsheet.com/
Vim Cheat Sheet https://vim.rtorr.com/
Cheatsheet for nano https://www.nano-editor.org/dist/latest/cheatsheet.html
Cheat.sh: the only cheat sheet you need https://github.com/chubin/cheat.sh#installation
tldr-pages/tldr: Collaborative cheatsheets for console commands https://github.com/tldr-pages/tldr