BitTorrent - BitTorrent is a peer-to-peer program developed by Bram Cohen and BitTorrent, Inc.
Video DownloadHelper - Browser extension to download videos from the Web
Deluge - Deluge is a full-featured BitTorrent client for Linux, Unix and Windows.
4k Video Downloader - 4K Video Downloader is a software program that helps people download video files from sites such as Facebook, YouTube and Dailymotion.
FrostWire - Easy to use BitTorrent Client and YouTube Downloader in one, with built-in search and music library.
youtube-dl-gui - A cross platform front-end GUI of the popular youtube-dl written in wxPython.