1)   SemanticWorks 2008
Altova SemanticWorks 2008 is the ground-breaking visual RDF/OWL editor. Visually design Semantic Web instance docs, vocabularies, and ontologies then output them in RDF/XML or N-triples. It is the sensible way to put the Semantic Web to work for you.
RDF, OWL, RDF editor, OWL Editor, RDFS, OWL DL, OWL Full, RDF/XML, N-Triples, ontologies,