Great Downloader easy to use can convert into multiple file formats. Fast and impressive
Video DownloadHelper - Browser extension to download videos from the Web
Mp3jam - Search for favorite music and download full albums with one click! Features
youtube-dl-gui - A cross platform front-end GUI of the popular youtube-dl written in wxPython.
Sonerezh - A self-hosted, web-based application for stream your music, everywhere.
Youtube Video and Audio Downloader - Download YouTube videos in all available formats and extract the original audio files.
Mp3Bear - Mp3Bear is an Mp3 music search engine that locates the mp3 files all over the net.