Great Downloader easy to use can convert into multiple file formats. Fast and impressive
Video DownloadHelper - Browser extension to download videos from the Web
SoundNode - SoundCloud desktop app (OS X, Windows, Linux)
youtube-dl-gui - A cross platform front-end GUI of the popular youtube-dl written in wxPython.
Cumulus - A SoundCloud player that lives in your menubar.
Youtube Video and Audio Downloader - Download YouTube videos in all available formats and extract the original audio files.
Tabletopy - Tabletopy is a free and friendly soundboard app that brings beautiful, immersive sound effects and ambient music to tabletop games.