The browser team at Nuanti Ltd. is developing Meta, a brand new WebKit port suited to embedding in OpenGL and 3D applications.
We've paid great attention to resolving the technical and practical limitations encountered with other web content engines.

uBrowser running with the WebKit Meta engine
You can currently contact us directly by email at info [at] nuanti [dot] com to find out more.
The original announcement blog post contains further details.
Nuanti Ltd. 2008-06-12