FlashGot!

DownThemAll (or just dTa) is a powerful yet easy-to-use Mozilla Firefox extension that adds new advanced download capabilities to your browser. DownThemAll lets you download all the links or images contained in a webpage and much more: you can refine your downloads by fully customizable criteria to get only what you really want.

Clean, adware free installers: https://board.jdownloader.org/showthread.php?t=54725

A cross platform front-end GUI of the popular youtube-dl written in wxPython.

4k Video Downloader allows to download video, audio, subtitles, channels and playlists from YouTube in high quality and to save it on your computer. This program is free for downloading videos and playlists of no more than 25 videos. This limitation may be removed by paying a license fee.

Freemake Video Downloader is a free video downloader that lets download videos from YouTube, Google, Facebook, Dailymotion and other sites either in HD, 4K, MP4, FLV, 3GP or convert web videos to FLV, AVI, MP4, MP3.

ClipGrab is a free downloader and converter for YouTube, Vimeo, Metacafe, Dailymotion and many other online video sites.It converts downloaded videos to MPEG4, MP3 or other formats in just one easy step.Downloaded videos can be converted to the following file formats: WEBM, WMV, MPEG4, OGG Theora, MP3 (audio only), OGG Vorbis (audio only).

Download videos from YouTube, Rai, Rai Replay, Video Mediaset, La7, Witty TV, Dplay and lots of other websites!

FlashGet is a leading download manager and has the highest amount of users on the internet. It uses MHT(Multi-server Hyper-threading Transportation) technique, supports various protocols and has excellent document management features.

Youtube Video and Audio Downloader is an open-source project, downloading Youtube videos (using Firefox download manager) in all available formats (FLV, MP4, WebM, and 3GP) with video quality of your choice. It also contains a pure JavaScript library to extract the original audio file out of FLV videos. It also shipped with an offline tool to extract audio files out of FLV videos.

Google Chrome Browser extension for download media (video;audio;streaming) online.

Download YouTube video and music in seconds. It’s fast, easy, and free.

Bulk Media Downloader grabs and downloads all sort of media resources in bulk. You can filter different types to prevent cluttering the grabber window. It also has a pause button to stop appending more resources.

Orbit Downloader is a Download Manager for Windows with special focus on downloading content from social media websites like Myspace, YouTube, Imeem, Pandora and Rapidshare. In addition it provides generic means to download media content from Flash based media players via its GetIt-Button and GrabIt++ tools.