<http://schema.org/topics>
"Cacoo,Denim,design,Dev &amp; Design,features,Gliffy,Lovely Charts,Lumzy,Mockflow,mockingbird,Pencil Project,Simple Diagrams,web design,web design series,web development,Website Wireframe,wireframe,wireframing"^^<http://www.w3.org/2001/XMLSchema#string>
<http://mashable.com/2010/07/15/wireframing-tools/>