Great Downloader easy to use can convert into multiple file formats. Fast and impressive
Verified - Verified is a skills-based daily learning app.
Video DownloadHelper - Browser extension to download videos from the Web
PiPer - A DIY Minecraft computer to build gadgets
youtube-dl-gui - A cross platform front-end GUI of the popular youtube-dl written in wxPython.
PiPifier - PiPifier is a macOS 10.
Youtube Video and Audio Downloader - Download YouTube videos in all available formats and extract the original audio files.