FastestTube!

Augmentable with front-ends such as Youtube-DLG , youtube-dl is a small command-line program to download videos from YouTube and a hundreds other sites. It requires the Python interpreter and is therefore platform-independent.

Freemake Video Converter is video converter that lets convert videos to avi, wmv, mp4 (iPhone, iPod, iPad, PSP, xBox), 3gp, rip dvd, extract mp3, burn DVD and Bluray, create photo slideshow and audio visualization, cut, join, rotate and upload videos, photos and music to YouTube.

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

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).

Peggo.tv is a Digital Video Recorder (DVR) that records MP3s of your favorite YouTube videos and SoundCloud tracks.

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.

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.

Deturl.com helps you download videos and MP3 music from YouTube, Facebook, Break, MetaCafe, DailyMotion, Vimeo, and many other sites, including adult sites. Deturl is a meta-site that links you directly into many different downloading tools and more.

TubeMaster++ is a powerful tool which can capture multimedia files you are watching or listening from your internet browser (FLV,MP3,MP4). Captured files can be saved directly on your computer or converted to other popular video or audio formats (AVI, MPEG, MP3, MP4, IPod, PSP ...). Websites examples : YouTube, DailyMotion, MySpace, Google Videos, LastFM, Grooveshark and many others ... Powerful search engines are also integrated to find videos or audio (mp3) files directly from the software.

With VideoGet you can easily download YouTube videos. VideoGet also supports downloads from more than 850 other video websites, including popular YouTube, MySpace, Google Video, Yahoo Video, MetaCafe, etc.

Unplug allows the user to download audio and video from video sharing websites.

FLVto lets you download YouTube videos by URL and convert them into other formats such as mp3, avi and mp4. It can download multiple files simultaneously and has a built-in audio player and ID3 tag editor for music.