Dictionaries & Encyclopedias -English & Specialty:
Urban Dictionary: Popular words in A (Slang dictionary)
Wikiwand.com - Wikipedia, But With A Modern Interface.
American FactFinder - US Census Bureau
Google Products Access your favorite Google products.
How to Address a Mayor of a US city - U.S. and International Forms of Address
Khan Academy - Learn almost anything for free.
The STANDS4 Network - Links to 15 reference and educational resources.
Learn Spanish - StudySpanish.com