Jdownloader

JDownloader.org is a free, open source download tool for grabbing videos and other content from hosting sites, which makes it useful for building a personal porn library without ads or interruptions. It handles batch downloads and DLC link containers, supports pause and resume, and works with browsers like Firefox and Chrome. Because it is built on Java it runs across platforms, and it comes in several languages. The catch is the dated, cluttered site and interface, and the setup it takes before it is genuinely useful.