KlickAud - Klickaud is a free web-based application to online download SoundCloud track, music, songs in MP3 formats.
CONV. - Convert YouTube video to MP3, GIF or MP4
SoundCloud to MP3 - SoundCloudToMP3.me is a great online service for downloading and converting soundcloud to MP3 files.
Downie - Video download for OS X. Downie supports at this moment over 1,000 different sites.
4k Video Downloader - 4K Video Downloader is a software program that helps people download video files from sites such as Facebook, YouTube and Dailymotion.
Yout - YouTube to Mp3 Converter