Books

1. FreeBookSearch.net: Comprehensive book searching portal with more than 30 search engines in its archive, the site searches hundreds of digital libraries and also scours the net for hidden books.
2. Google Book Search: The power of Google to find books. Google's entry will not let you see full text if the copyright is still active in your jurisdiction.

1. The College Search Engine.com: Searches the webistes of colleges and universities worldwide, not just the USA. If it is on a university website somewhere, this search engine will find it.
2. Skoolz.org: Search colleges and universities. Use this search to search only the websites of colleges - to find courses, information, professors, curricula, etc.
3. Google University Search allows you to search a specific site - one school at a time. The list of schools is comprehensive. Skoolz searches them all at once, Google University Search allows them to be searched one at a time.

1. Scirus: The most comprehensive scientific research tool on the web. Over 450 million scientific items indexed at last count. Search journals, scientists' homepages, courseware, pre-print server material, patents, more...