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.

Coursera - Build skills with courses, certificates, and degrees online from world-class universities and companies

KeepVid - A free web application that allows you to download videos

Khan Academy - Khan Academy offers online tools to help students learn about a variety of important school subjects. Tools include videos, practice exercises, and materials for instructors. Read more about Khan Academy.

ShareTube - Watch YouTube, synced with friends.

edX - Best Courses. Top Institutions. Learn anytime, anywhere.