Great Downloader easy to use can convert into multiple file formats. Fast and impressive
Video DownloadHelper - Browser extension to download videos from the Web
Scrivener - Scrivener is a content-generation tool for composing and structuring documents.
youtube-dl-gui - A cross platform front-end GUI of the popular youtube-dl written in wxPython.
Final Draft - Use your creative energy to focus on the content; let Final Draft take care of the style.
Youtube Video and Audio Downloader - Download YouTube videos in all available formats and extract the original audio files.
yWriter - Free writing software designed by the author of the Hal Spacejock and Hal Junior series. yWriter6 helps you write a book by organising chapters, scenes, characters and locations in an easy-to-use interface.