Wontube Free Video Converter!

HandBrake is an open-source, multithreaded video transcoder- it converts digital media from one format to another, compressing the files in the process. Handbrake can rip encrypted DVDs with libdvdcss (libdvdcss is installed with VLC media player on Mac OS X, or AnyDVD/DVD 43 on Windows).

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.

Format Factory is a multifunctional media converter and DVD ripper. It will convert (and compress):

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.

VidCoder is a DVD/Blu-ray ripping and video transcoding application for Windows. It uses HandBrake as its encoding engine.

FlashGot is the free add-on for Firefox and Thunderbird to capture embedded links for all types of files (not just flash movies). -Capture all links from a page-Capture all links from all tabs-Make a selection on a web page and capture all links in that selection.-Filter the links using a mask (e.g. to download only certain types of files)-Pass on the links to your favorite download manager

MediaCoder is a free universal batch media transcoder, which nicely integrates most popular audio/video codecs and tools into an all-in-one solution. With a flexible and extendable architecture, new codecs and tools are added in constantly as well as supports for new devices.

MeGUI is a video conversion application, which was primarily designed to be a DVD ripper, but is capable of many transcoding tasks. It is essentially a frontend for many free tools, but also includes a number of utilities to enhance the conversion process.