> Looking for fast, easy to use, and powerful cli applications. Especially interested in programs written in Rust.
Seems like a vague question, are you looking for inspiration for your own CLI application?
If so, I recommend leveraging libraries like [1] commander. Which allows you to intuitively wire up your CLI app with --option and --help on every command.
One of my favourite CLI apps is [2] httpie. It has a simple, easy to use API, which is intuitive and fast too.
Don't think any of these are Rust, but here you go:
youtube-dl: Download video from many sites all across the internet.
nvlc: ncurses interface to VLC, my personal favourite music player.
htop: Pretty good system monitor for terminal.
lynx/links: Web browsers for terminal.