Great Downloader easy to use can convert into multiple file formats. Fast and impressive
Adobe Acrobat DC - Make your job easier with Adobe Acrobat DC, the trusted PDF creator. Use Acrobat to convert, edit and sign PDF files at your desk or on the go.
Video DownloadHelper - Browser extension to download videos from the Web
Wondershare PDFelement - All-in-one PDF editor
youtube-dl-gui - A cross platform front-end GUI of the popular youtube-dl written in wxPython.
Foxit Reader - Foxit Reader is a free and light-weight multi-platform PDF document viewer.
Youtube Video and Audio Downloader - Download YouTube videos in all available formats and extract the original audio files.