Mobile search; text a question to ChaCha (242242) and receive an answer.
Does real-time searches; shows content from more 'static' pages as well as from more dynamic sites such as Twitter, Digg, Delicious, etc.
Create a custom page on any topic, this page seaches many different sources that you can define, such as Google News, Bing, Flickr, Twitter, Blogs, etc. Save and share.
Advertised as the web's leading Q&A site; up until 2009 answers.com was where Google went for the definitions link;
Non profit digital library that provides storage and access to digital material. Their mission statement is "universal access to all knowledge."
Great collection of web reference resources.
Research and track the United States Congress; research and track your congress member, bills, resolutions, voting records, and news.