This page is intended to provide an overview over remarkable real-world applications of Semantic Web technologies. Note that this is not referring to software tools which have their own space, but rather to examples of successful practical uses of semantics.
Many examples come to mind, but help is needed to explicate and organise all that. Please contribute.
This site provides remarkable application based on wikipedia data. They give API that will rank a text content based on its relevence to various categories and give numeric weights on each category.
A passage from The Jurassic Park may give something like
"Movies/Holliwood/Spielberg 30" etc.