Trice is Web development framework that uses RDF technology to increase productivity and flexibility for everyday Web programming.

• Pure-PHP (version 4 or 5), MySQL (version 4 or 5)
• Open-Source
• Built on top of ARC
• Completely driven by RDF and SPARQL, but as easy to use as any other Web CMS
• essential modules are built in (forms, templates, wiki-like publisher, usage statistics, access control, …)
• Extensible wiki markup for formatting, semantic publishing (microformats, RDF-in-HTML), and sparqlets (SPARQL-driven widgets)
• Built-in support for remote scripting (AJAX)
• Application-wide and per-controller themeing

More info on semsol.com