Great Downloader easy to use can convert into multiple file formats. Fast and impressive
Slidesgo - An extensive catalog of free Google Slides themes and PowerPoint templates.
Video DownloadHelper - Browser extension to download videos from the Web
SlideModel.com - Create attractive presentations with our professional PowerPoint templates, slide designs, and themes. Use our PPT templates and slide designs to give unique appearance to your presentation.
youtube-dl-gui - A cross platform front-end GUI of the popular youtube-dl written in wxPython.
SlideTeam - Transform rough sketches, notes into professional PowerPoint presentations.
Youtube Video and Audio Downloader - Download YouTube videos in all available formats and extract the original audio files.