4k Video Downloader - 4K Video Downloader is a software program that helps people download video files from sites such as Facebook, YouTube and Dailymotion.
2conv.com - 2conv.com is a simple yet powerful online video converter and downloader that allows you to download any YouTube videos in Mp3 quickly.
Video DownloadHelper - Browser extension to download videos from the Web
KlickAud - Klickaud is a free web-based application to online download SoundCloud track, music, songs in MP3 formats.
youtube-dl-gui - A cross platform front-end GUI of the popular youtube-dl written in wxPython.
SoundCloud to MP3 - SoundCloudToMP3.me is a great online service for downloading and converting soundcloud to MP3 files.