Eurekster
Eurekster is a company founded in Christchurch, New Zealand, with an office located in San Francisco, California, that builds social search engines for use on websites, the search engines are called "swickis" (search plus wiki).
Launching to the public on 21 January 2004, Eurekster hosts around 100,000 swickis for various websites, which total approximately 20 million searches per month, or around 800,000 searches per day.