Great Downloader easy to use can convert into multiple file formats. Fast and impressive
ByClick Downloader - ByClick Downloader (Former YouTube By Click) is a video downloader software for Windows. (Former YouTube By Click) Supported sites: YouTube, Dailymotion, Vimeo, Facebook, Instagram, Twitter, Pinterest and +40 site
Video DownloadHelper - Browser extension to download videos from the Web
Tunebang - Free online YouTube to MP3 converter.
youtube-dl-gui - A cross platform front-end GUI of the popular youtube-dl written in wxPython.
Youtube Mp3 Today - Convert youtube videos to mp3 in 1 click every time
Youtube Video and Audio Downloader - Download YouTube videos in all available formats and extract the original audio files.