A9.com - Innovations in Search Technologies - OpenSearch
http://opensearch.a9.com/-/company/opensearch.jsp
A9.com invented the OpenSearch technology for search aggregation in 2004.
OpenSearch is a set of simple formats for the sharing of search results. Any website that has a search feature can make their results available in OpenSearch format. Other tools can then read those search results.
Searching across websites with OpenSearch | StressFree
http://www.stress-free.co.nz/searching_across_websites_with_opensearch
"Providing search services that span a number of disparate websites is a challenging problem that in the past has been left to the big-boys such as Google. However Amazon's OpenSearch RSS format is changing this reality and providing a means for effective multiple website search to be deployed at low cost by small development teams. "
XML.com: Introducing OpenSearch
http://www.xml.com/pub/a/2007/07/20/introducing-opensearch.html?ATT=Introducing+OpenSearch&CMP=OTC-TY3388567169
"You go to your favorite Web 2.0 search engine and set up a query like http://web20.example.com/search=john+doe&ouptut=atom and search for "john doe," but rather than getting back results as the usual HTML web page, you get it back in Atom format."
Ludicrous › Firefox Search Plugin: Post Updates to Twitter right from your Firefox Search Bar!
http://lud.icro.us/post-twitter-updates-from-firefox
"“Post to Twitter” is a search plugin for Mozilla Firefox which allows you to quickly post statuses (or “tweets”) to your Twitter account from the Firefox search bar"