Uni-Form is an attempt to standardize form markup (xhtml) and css, "modularize" it, so even people with only basic knowledge of these technologies can get nice looking, well structured, highly customizable, semantic, accessible and usable forms.
OpenCalais Integration module allows you to to automatically discover semantic relations between your content, Create relevant tags in the Sitecore Taxonomy and tag your content with those by integrating the Sitecore Taxonomy Module, WeBlog Module or any Sitecore item based taxonomy seamlessly with OpenCalais service without additional development.
The service is open for commercial and non-commercial use and is free if you don't need to tag more than 50,000 documents a day. The service is easy to apply in your project with this module and almost effortless if you're already using the Sitecore's Shared Source Taxonomy Module.