ARF is a free development framework for MOSS and WSS which provides functionality to create accessible SharePoint Publishing sites. Accessibility is becoming more and more important in organizations for different reasons. They want to reach a wider public and even government guidelines state that they hve to comply to these rules.

The product is delivered as a feature and which is installed and acticated at site collection level. Some of the features this product delivers are:
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AA Accessible MOSS Publishing Sites
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ARF is based on valid XHTML
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Creation of contact forms, queries, search, filters and paging without writing any line of code
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Partially caching of portions of pages based on time and audience
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More then 30 controls like: XML Based menu, compatibility panel, XML Based calender view, SearchBox, etc.
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Fixing of invalid rendered HTML by Microsoft (we all know what the current HTML looks like)
http://www.spworks.co.uk/arf/default.aspx