10 best reference sites

Best Free Reference Web Sites 2009, Eleventh Annual List, RUSA Machine-Assisted Reference Section (MARS) 
This is an annual series initiated under the auspices of the Machine-Assisted Reference Section (MARS) of the Reference and User Services Association (RUSA) of ALA to recognize outstanding reference sites on the World Wide Web. View selection criteria.

Among the winners: (for complete list and more info on each site, visit the ALA page)

Title: The American Presidency Project
URL: http://www.presidency.ucsb.edu/

Title: BBC Country Profiles
URL: http://news.bbc.co.uk/2/hi/country_profiles/default.stm
 
Title: BookFinder.com
URL: http://www.bookfinder.com/
  
Title: Chronicling America: Historic American Newspapers
URL: http://chroniclingamerica.loc.gov/
 
Title: English Short Title Catalog
URL: http://estc.bl.uk/
 
Title: ePodunk (TM)
URL: http://www.epodunk.com/


Title: Lexicool
URL: http://www.lexicool.com/