YoutubeMultiDownloader - Just like its name YouTube Multi Downloader, it is an online website for downloading the videos of downloading without using any video download and accelerator.
SaveFrom.Biz - Convert YouTube video URL to MP4 file and download it to your device. SafeFrom is the best YouTube video downloader and converter.
KeepVid - A free web application that allows you to download videos
ShareTube - Watch YouTube, synced with friends.
YouTubNow Downloader - YouTube video downloader that quickly and easily saves YouTube videos.
YTD - YTD Youtube Downloader lets you save videos from tons of websites and play them on your computer. Best of all, it’s free! Available for Windows & Mac