Great Downloader easy to use can convert into multiple file formats. Fast and impressive
DaVinci Resolve - Revolutionary new tools for editing, color correction and professional audio post production, all in a single application!
Video DownloadHelper - Browser extension to download videos from the Web
Kudoflix - A new video editor made for all. The only movie maker that gives Professional results without spending time or money learning or rendering.
youtube-dl-gui - A cross platform front-end GUI of the popular youtube-dl written in wxPython.
Kdenlive - Free and open-source, full-featured video editor.
Youtube Video and Audio Downloader - Download YouTube videos in all available formats and extract the original audio files.