libRocket is the C++ user interface middleware package based on the HTML and CSS standards. It is designed as a complete solution for any project's interface needs.

libRocket uses the time-tested open standards XHTML1.0 and CSS2.0 (while borrowing features from HTML5 and CSS3), and extends them with features suited towards real-time applications. Because of this, you don't have to learn a whole new proprietary technology like other packages in this middleware space.

Kong is a great free 3D shooter and it's also powered by libRocket!

We put together this entry in to the three-week VGNG competition at TIGSource, using libRocket for the interface. Check out No One Can Stop The Farm Pioneer!

Packed with features!

• Cross platform across all desktop environments: Windows, Mac OSX (Intel) and Linux.
• Dynamic layout system.
• Efficient application-wide styling, with a custom-built templating engine.
• Fully featured open source user control set: buttons, sliders, drop-downs, etc.
• Runtime visual debugging suite.
• Easily integrated and extensible with Python scripting.

Extensible:

• Abstracted interfaces for plugging in to any game engine.
• Decorator engine allowing custom application-specific effects that can be applied to any element.
• Generic event system that binds seamlessly into existing projects.