Search Engines - Special Tools

A highly selected list of my favourites in various categories

Academic/scholarly resources

See also indexes and bibliographies in the LIS field.

Bielefeld Academic Search Engine: Multidisciplinary and multilingual search engine for scientific Web sites, based on OAI harvesting and FAST search technology.
Google Scholar: Can be customized to indicate whether your library has access to the full-text of resources in the rsults.
Scirus: From Elsevier. For scientific information only. I love this example: "If you search on Dolly, Google finds Dolly Parton, Scirus finds the cloned sheep."
Scopus: From Elsevier. Sciences and social sciences.

Evri: Not yet available, but press indicates that it might be intersting.
Exalead: Tries to use all of the bells and whistles everyone else has been playing with. All at the same time. Beta, but fun.
Searchme Visual Search: Shows results in a coverflow-style parade of Web pages, with colour-coded highlighting of search terms.
SurfWax: Interesting. Search results in two frame display - titles and which engine on the right, space for preview on the left. Depending on your term, you can focus, which shows interactive thesaurus displays for the term, with click to add to search. Also allows saving search results or documents for re-use.

Big List of Blog Search Engines: Useful meta-directory.
Board Reader: Searches almost 800,000 forums and message boards.
Google Groups: Originally Deja News, until acquired by Google. Now a poorly designed but still useful forum and group searcher.