Great Downloader easy to use can convert into multiple file formats. Fast and impressive
Video DownloadHelper - Browser extension to download videos from the Web
Audiobook Converter - AudioBookConverter simple and lightweigh application to convert set of mp3 files to single m4b file to be played on i-device AudioBookConverter support conversion of most of popular formats to m4b, it also handle existing m4b files and process them.
youtube-dl-gui - A cross platform front-end GUI of the popular youtube-dl written in wxPython.
AudioBookBinder - Got a lot of audiobooks in MP3 format and would like to listen them on your iPod?
Youtube Video and Audio Downloader - Download YouTube videos in all available formats and extract the original audio files.
Free Audiobooks - Free Audiobooks is a digital audiobooks library app that comes up with an extensive collection of more than 14000 different audiobooks to help you in boosting up your knowledge right at your fingertips.