Great Downloader easy to use can convert into multiple file formats. Fast and impressive
Audacity - Audacity is a free and open-source audio production software suite that includes a surprising array of editing tools and recording systems.
Video DownloadHelper - Browser extension to download videos from the Web
Audio Recorder - ‘Audio Recorder’ is a small utility for recording audio.
youtube-dl-gui - A cross platform front-end GUI of the popular youtube-dl written in wxPython.
Audio Record Wizard - How to record streaming audio with the streaming audio recorder - Audio Record Wizard.
Youtube Video and Audio Downloader - Download YouTube videos in all available formats and extract the original audio files.