Great Downloader easy to use can convert into multiple file formats. Fast and impressive
Video DownloadHelper - Browser extension to download videos from the Web
Sensor Tower - Sensor Tower is a platform for app store optimization and app industry intelligence.
youtube-dl-gui - A cross platform front-end GUI of the popular youtube-dl written in wxPython.
App Annie - App Annie is a marketing analytics tool available for apps of all kinds. With App Annie, you can track sales, traffic, and a variety of other factors pertinent to monitoring an app's trajectory.
Youtube Video and Audio Downloader - Download YouTube videos in all available formats and extract the original audio files.
appfigures - Cross-platform app store analytics for all of your mobile apps.