MediaHuman YouTube to MP3 Converter - Extracts MP3 audio from YouTube, Vimeo, Dailymotion, Mixcloud, Bandcamp, SoundCloud and many others. Available for macOS, Windows and Ubuntu/Linux. FREE!
Virtual Audio Cable - Ever wanted to record your speaker output? (loopback) This is for you.
Youtube Video and Audio Downloader - Download YouTube videos in all available formats and extract the original audio files.
Loopback by RogueAmoeba - Get all the power of a high-end studio mixing board, right inside your Mac!
4k Video Downloader - 4K Video Downloader is a software program that helps people download video files from sites such as Facebook, YouTube and Dailymotion.
JACK Audio Connection Kit - JACK Audio Connection Kit|Home