Great Downloader easy to use can convert into multiple file formats. Fast and impressive
Video DownloadHelper - Browser extension to download videos from the Web
Envite - An integrated social chat for your e-commerce site
youtube-dl-gui - A cross platform front-end GUI of the popular youtube-dl written in wxPython.
Knowledge Commons by UNESCO MGIEP - Social network for social change
Youtube Video and Audio Downloader - Download YouTube videos in all available formats and extract the original audio files.
Ejimoo - Minimal Social Platform. No Comments. Self-confidence gained