Heist is a powerful template system that supports both HTML5 and XML.
Some of Heist's features are:
* Designer-friendly HTML5 (or XML) syntax
* Templates can be reloaded to make changes visible without recompiling
your Haskell code
* Enforces near-perfect separation of business logic
and view
* Powerful abstraction primitives allowing you to eliminate repetition
* Easy creation of domain-specific markup languages
* Built-in support for including JSON and Markdown content in templates
* Simple mechanism for designer-specified template caching
* Optional merging of multiple <head> tags defined anywhere in the document
WWW: http://snapframework.com/