You-Get - Command-line utility to download media contents from the web
Yout - YouTube to Mp3 Converter
Softorino YouTube Converter - Download YouTube video & audio. Watch and listen offline
Softorino π»π² - Indie software developer with attitude π
Peggo - Peggo is a best and feature-rich mp3 and mp4 converter that allows you to download audio and video files from YouTube and SoundCloud.
Brunhilde - Analyze YouTube comments to know what your audience thinks