Great Downloader easy to use can convert into multiple file formats. Fast and impressive
Video DownloadHelper - Browser extension to download videos from the Web
Videostream - The easiest way to stream video from your computer to Chromecast or AndroidTV.
youtube-dl-gui - A cross platform front-end GUI of the popular youtube-dl written in wxPython.
AirWire - AirWire is a highly advanced application that enables its users to connect to their smartphone or any tablet device to a network, select any file and start playing any multimedia file.
Youtube Video and Audio Downloader - Download YouTube videos in all available formats and extract the original audio files.
AllCast - AllCast is a mobile application that allows you to send photos, videos and music on your phone to your TV.