Semantic Web Services

inbenta Semantic Search
SaaS-based service that provides search to any website within the cloud. Includes Semantic Search capabilities and Natural Language Processing (NLP). Site owners can integrate Semantic Search engine on their site and their content. Other features include customization, XML ,API, and real-time reporting tools. This search approach has its foundations in lexical functions and Meaning-text theory (I. Mel’cuk , A. Žolkovskij, J. Apresjian).

Ookaboo
Ookaboo is a collection of over 250,000 images that are free to use in the public domain or under creative commons. Images in Ookaboo are indexed under Linked Data terms derived from dbpedia and Freebase, so a JSON-based API can be used to find images with unprecedented precision. Ookaboo also publishes RDFa metadata for images and topics.

OpenCalais
A rapidly growing toolkit of capabilities that allow you to readily incorporate state-of-the-art semantic functionality within your blog, content management system, website or application.

The OpenCalais Web Service automatically creates rich semantic metadata for the content you submit – in well under a second. Using natural language processing (NLP), machine learning and other methods, Calais analyzes your document and finds the entities within it. But, Calais goes well beyond classic entity identification and returns the facts and events hidden within your text as well.

The tags are delivered to you; you can then incorporate them into other applications - for search, news aggregation, blogs, catalogs, you name it.