VLC Media Player - VLC is a free and open source cross-platform multimedia player and framework.
4k Video Downloader - 4K Video Downloader is a software program that helps people download video files from sites such as Facebook, YouTube and Dailymotion.
AIMP - AIMP : Free Audio Player : Официальный сайт программы
Video DownloadHelper - Browser extension to download videos from the Web
foobar2000 - An advanced freeware audio player for the Windows platform.
youtube-dl-gui - A cross platform front-end GUI of the popular youtube-dl written in wxPython.