Great Downloader easy to use can convert into multiple file formats. Fast and impressive
qBittorrent - Lightweight and open source torrent client that runs on all major platforms.
Video DownloadHelper - Browser extension to download videos from the Web
Deluge - Deluge is a full-featured BitTorrent client for Linux, Unix and Windows.
youtube-dl-gui - A cross platform front-end GUI of the popular youtube-dl written in wxPython.
µTorrent - Looking for a torrent site to download movies, music and more? Choose from top torrent sites like The Pirate Bay, RARBG, 1337X, and dozens more. (October 2019)
Youtube Video and Audio Downloader - Download YouTube videos in all available formats and extract the original audio files.