Great Downloader easy to use can convert into multiple file formats. Fast and impressive
Video DownloadHelper - Browser extension to download videos from the Web
Musicolet - Musicolet is a small yet feature-rich offline Music Player for Android.
youtube-dl-gui - A cross platform front-end GUI of the popular youtube-dl written in wxPython.
Palco MP3 - Palco MP3 is the largest Brazilian application for independent artists and offers more than 1 million songs for you to listen and download on your mobile device.
Youtube Video and Audio Downloader - Download YouTube videos in all available formats and extract the original audio files.
Audiomack - The free SoundCloud alternative