Yout - YouTube to Mp3 Converter
Mac CLi - OS X command line tools for developers
Softorino YouTube Converter - Download YouTube video & audio. Watch and listen offline
You-Get - Command-line utility to download media contents from the web
YouTubeDLD - World's most efficient YouTube downloader. No spam or ads.
Soft Serve - Soft Serve is a self-hostable Git server with a built in SSH interface, built for the command line.