Flash Video Downloader - Flash Video Downloader is a popular extension for Google Chrome browser for downloading wide range of files over the internet.
Video DownloadHelper - Browser extension to download videos from the Web
Video Downloader All - Video Downloader All is the name of a free to use and state of the art downloader that is available in form of extension for Google Chrome web browser.
FlashGot - FlashGot is a browser extension for Mozilla Firefox that is designed to make it easy to download a whole batch of files in one go. The extension is open source and free to use, but it is no longer compatible with the most recent version of Firefox.
ClipGrab - A friendly downloader for YouTube and other sites
GrabAnyMedia - Grab Any Media is a popular video downloading extension for the web browsers.