Great Downloader easy to use can convert into multiple file formats. Fast and impressive
Addoncrop - Extends the functionality of your web browser
Video DownloadHelper - Browser extension to download videos from the Web
Chrome Extension Downloader - Chrome Extension Downloader is the name of a website dedicated for downloading and Chrome extensions.
youtube-dl-gui - A cross platform front-end GUI of the popular youtube-dl written in wxPython.
ChromeReloadPlus - This is a modified version of ChromeReload (...
Youtube Video and Audio Downloader - Download YouTube videos in all available formats and extract the original audio files.