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 tags defined anywhere in the document WWW: http://snapframework.com/