Open Sahara is a free webservice that can analyse, index and semantically enrich the content of documents, websites, and blogs.
Additionally, Open Sahara offers professional services for software development related to text-mining, indexing, kowledge extraction, semantic plugins and applications.
"The RB is designed to help users understand relationships between items in a collection and to support exploration of an information space (e.g., a set of documents or webpages)."
"ReVerb is a program that automatically identifies and extracts binary relationships from English sentences. ReVerb is designed for Web-scale information extraction, where the target relations cannot be specified in advance and speed is important."
"Want a film recommendation related to writers you like? Want to discover bands at the crossroad of an electro and rock record-labels you like? Interested by more complex and composite recommendations based on your deepest interests: a writer, a film and a band combination? Or maybe something simpler ;) ?"