pyload-ng

Pyload is a powerful, open-source download manager designed to simplify your file downloads. All common video-sites, one-click-hosters, container formats and well known web standards are supported to allow you to download your files.

Additionally, Pyload has a great variety of plugins to automate common tasks and make unattended running possible.

Pyload has a fully featured and well documented Application Programming Interface, easily extendable and accessible by external tools, cross-platform apps or other softwares.