Semantic



GoPubMed

Search portal claimed as the first ever semantic search engine. Focuses on biomedical texts.

Hakia

Semantic search engine with reliable results and relevant information for queries.

IDMARCH

Semantic document search engine also known as the International Digital Medial Archive.

Swoogle

Semantic web search engine launched in 2007 specializing in web ontologies, terms, data, and documents published on the web.