I often use the following tools:
fzf - fuzzy finder e.g. files
gdu - tui for disk usage
rga - search file contents
bat - cat with syntax highlight
difft - better diff
lazygit - tui for gut
lazydocker - TUI for dicker
restic - backup tool
rclone - sync tool
f2 - file renaming tool
You can find them all in github.