Google XML Pages 0.2 (Beta)

GXP is a templating system used to generate XML/SGML markup (most often HTML).

Core Features

Support for multiple programming languages (currently Java & JavaScript; C++ in progress).
Support for runtime recompilation.
Compile-time type checking and partial markup validation.
Type-aware automatic escaping of content greatly reduces the chance of XSS vulnerabilities.
Easy to use internationalization support.
Convenient parameter passing/modularization system.
Very lightweight runtime system.
Strongly encourages functional (as opposed to imperative) style in templates for a highly maintainable presentation layer.