Getfvid - Getfvid is an online tool that allows you to convert any Facebook video to mp3 or mp4 and download them without paying any fees.
Yout - YouTube to Mp3 Converter
FastVid - FastVid offers a Video Downloader for Facebook that allows you to select any video from FB, copy its URL, paste it into the field, and click on download to save it to your device.
Softorino YouTube Converter - Download YouTube video & audio. Watch and listen offline
Video Downloader for Facebook - Video Downloader for Facebook is the best-in-class FB video downloader for browsing and downloading the favorite video with a single tap.
You-Get - Command-line utility to download media contents from the web