Great Downloader easy to use can convert into multiple file formats. Fast and impressive
Video DownloadHelper - Browser extension to download videos from the Web
SoundCloud Go - Your favorite music and new discoveries, offline and ad-free
youtube-dl-gui - A cross platform front-end GUI of the popular youtube-dl written in wxPython.
Audiomack - The free SoundCloud alternative
Youtube Video and Audio Downloader - Download YouTube videos in all available formats and extract the original audio files.
Jukebox - Collaborative music player