YourTube!

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.

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

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!

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.

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

Download YouTube music from your browser and save it in MP3, M4A or OGG with the best possible quality.

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.

Allows to download videos for offline viewing to the sdcard of the device. Google controversially remove all YouTube downloaders from Google Play (Android Market), but it is available at other Android markets such as SAM - SlideME Application Manager . This app is not Open-source and contains advertising, but it is free.

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.