Great Downloader easy to use can convert into multiple file formats. Fast and impressive
Video DownloadHelper - Browser extension to download videos from the Web
Bulk Media Downloader - Grab and download media (image, audio, and video) resources by monitoring network.
youtube-dl-gui - A cross platform front-end GUI of the popular youtube-dl written in wxPython.
Simple Mass Downloader - A simple but powerful bulk/mass downloader.
Youtube Video and Audio Downloader - Download YouTube videos in all available formats and extract the original audio files.
Download All Images - Use this free extension to download all images from any web page with a single click.