Great Downloader easy to use can convert into multiple file formats. Fast and impressive
HandBrake - HandBrake allows users to easily convert video files into a wide variety of different formats.
Video DownloadHelper - Browser extension to download videos from the Web
Leawo Video Converter Ultimate - Leawo Video Converter Ultimate can easily convert video and dvd to any video formats, burn video to Blu-ray and DVD disc, download online videos with fast speed. It's the best video converter for windows 8.
youtube-dl-gui - A cross platform front-end GUI of the popular youtube-dl written in wxPython.
AnyMP4 DVD Converter - AnyMP4 DVD Converter can convert DVD/video to any popular video/audio format like MP4/MOV/AVI/FLV/MKV/MPEG, MP3/FLAC/M4A and more.
Youtube Video and Audio Downloader - Download YouTube videos in all available formats and extract the original audio files.