Great Downloader easy to use can convert into multiple file formats. Fast and impressive
VCASMO - VCASMO is a multimedia presentation solution for photo and video slide shows, business presentations, training, academic teaching, sales pitches, and seminars.
Video DownloadHelper - Browser extension to download videos from the Web
PreZentit - Prezentit is an online presentation solution based on JavaScript that comes with new online collaboration tools.
youtube-dl-gui - A cross platform front-end GUI of the popular youtube-dl written in wxPython.
SlideShare - Discover, Share, and Present presentations and infographics with the world’s largest professional content sharing community.
Youtube Video and Audio Downloader - Download YouTube videos in all available formats and extract the original audio files.