Wikipedia
Yolink
yolink is a search technology developed by TigerLogic that mines links and documents to retrieve keyword-rich blocks of information. It employs semantic and propriety technology to uncover information hidden inside links and documents.
It is available as a free add-on for Google Chrome, Mozilla Firefox, RockMelt, Safari and Internet Explorer browsers. It is also available as free blog plugin for Blogger, WordPress and others. yolink is also available as an API.