LeechCraft is described as 'free open source cross-platform modular internet-client' and is an app in the News & Books category. There are four alternatives to LeechCraft for a variety of platforms, including Mac, Windows, Linux, Windows Mobile and PortableApps.com. The best alternative is Opera, which is free. Other great apps like LeechCraft are Min (Free, Open Source), Oryoki (Free, Open Source) and Foo Screen (Paid, Open Source).
A full screen browser made for interactive prototypes. Typically a framer.js/p5.js/processing.js/lottie.js/SVG/Canvas/WebGL or any webkit technology based project. Not for general internet surfing use.