Think you might have a rare disease? Check the new specialty search engine from Denmark — FindZebra. But read about it first in The Rare Disease Search Engine That Outperforms Google (Physics arXiv Blog, Mar 18).
The magic sauce in FindZebra is the index it uses to hunt for results. These guys have created this index by crawling a specially selected set of curated databases on rare diseases. These include the Online Mendelian Inheritance in Man database, the Genetic and Rare Diseases Information Center and Orphanet.
They then use the open source information retrieval tool Indri to search this index via a website with a conventional search engine interface. The result is FindZebra.