Great Downloader easy to use can convert into multiple file formats. Fast and impressive
Bizdownloader - Bizdownloader is Video Downloader website from top social networking websites like Youtube...
Video DownloadHelper - Browser extension to download videos from the Web
Transcoder - Transcoder is a free command-line-based video converter that allows you to convert any size of video into a range of audio and video formats.
youtube-dl-gui - A cross platform front-end GUI of the popular youtube-dl written in wxPython.
HD Video Converter - HD Video Converter Factory Pro is designed to convert hd video, download hd video from YouTube, and edit hd video(including 4K, 1080P, 720P source in any format).
Youtube Video and Audio Downloader - Download YouTube videos in all available formats and extract the original audio files.