Great Downloader easy to use can convert into multiple file formats. Fast and impressive
Home-Assistant.io - Home Assistant is an open-source home automation platform running on Python 3.
Video DownloadHelper - Browser extension to download videos from the Web
ioBroker - flexible and modular application for the IoT and Smarthome
youtube-dl-gui - A cross platform front-end GUI of the popular youtube-dl written in wxPython.
openHAB - "empowering the smart home" - vendor and technology agnostic open source home automation
Youtube Video and Audio Downloader - Download YouTube videos in all available formats and extract the original audio files.