Almanacs

1. Information Please Almanac
   This is the online version of the Time Almanac. It is a comprehensive reference source that "allows searching along with the contents of an encyclopedia, a dictionary, an atlas, and several almanacs containing statistics, facts, and historical records."
2. Guinness Worlds Records
   The Guinness Worlds Records site contains "selection of records found in the Guinness World Records database."

Atlases and Maps

• Atlapedia Online
  Atlapedia Online contains full color physical maps, political maps as well as key facts and statistics on countries of the world.
• Google Maps
  Based on the widely-popular software Google Earth. Contains high quality pictures of some portions of the world.
• Information Please World Atlas and Map Library
  It features maps and detailed profiles of all 193 countries and the 50 US States.
• MapQuest
  It is a mapping and directories site that helps people find places, get there, and find places nearby.

Dictionaries and Thesaurus

• Merriam-Webster online
  Facilitates access to the print version of Merriam Webster Collegiate Dictionary Eleventh Edition. Includes thesaurus, audio pronunciations feature, real time words, word games, and other materials in the English language.
• Cambridge Dictionaries Online
  Intended for non native speakers, this site provides searchable versions of Cambridge's Advanced Learner's Dictionary, Dictionary of American English, International Dictionary of Phrasal Verbs, International Dictionary of Idioms, Lerner's Dictionary, Diccionario Cambridge Klett Compact ( English-Spanish ), and Dictionnaire Cambridge Klett Compact ( English- French ).
• The Free Dictionary
  Serves as "English, Medical, Legal, Financial, and Computer Dictionaries, Thesaurus, Acronyms, Idioms, Encyclopedia, a Literature Reference Library, and a Search Engine all in one".
• Dictionary.com
  Includes Random House Dictionary, The American Heritage® Dictionary of the English Language, Online Etymology Dictionary, Merriam-Webster's Medical Dictionary, The American Heritage® Stedman's Medical Dictionary, The American Heritage® Science Dictionary, The American Heritage® Abbreviations Dictionary and more.
• Management Dictionary
  The world's biggest business dictionary of management methods, models and authors. Find 2000 business concepts, scholars and acronyms.
• Engineering Dictionary
  EngNet® is a powerful Directory/Search Engine/Buyers Guide Service aimed specifically at the Engineering Industry to enable Engineers, Technicians, Tradesmen, etc. to find information and communicate effectively with suppliers in the Engineering Industry.
• Sebastian's Building/Construction Pathology Glossary
  A free technical glossary for building pathology and construction technology, architecture, civil, structural, forensic, mechanical, pavement, and materials engineering, with elements of testing and quality science by A. Sebastian.

Encyclopedias

• Encyclopedia Britannica Online
  An online version of the widely-used Encyclopedia Britannica. It contains more than 120,000 articles, thousands of images and videos, online dictionary and many more.
• Encyclopedia.com
  Encyclopedia.com gives free access to nearly 200,000 reference entries from sources you can cite. Plus, more than 50,000 topic summaries feature related pictures, videos, topic summaries, and newspaper and magazine articles from around the world. Encyclopedia.com also provides innovative tools that allow you to rate and sort the reference content you find to be the most useful.

Philippine Online Dictionary

• A dictionary of Cebuano Visayan. Volume I
  http://seapdatapapers.library.cornell.edu/cgi/t/text/text-idx?c=seap;idno=seap085a
  A reference tool is meant for Cebuano speakers and as a tool for students of Cebuano Language.
  
• English Cebuano Dictionary
  http://www.jonsay.co.uk/dictionary.php?langa=English&langb=Cebuano
  
• Hiligaynon-English Dictionary
  http://www.bohol.ph/kved.php
  Facilitates access to the print version of John Kaufmann's Visayan-English Dictionary, one of the best dictionaries ever written for the Hiligaynon language.
  
• The Online Ilokano Dictionary Project
  http://www.toidp.com/
  An online Ilokano resource material designed to facilitate the communication between the Ilokano and English speakers of the language.
  
• Philippine Language Translator and Dictionary
  http://translate.sandayong.com/ OffersTagalog, Bisaya, and English word meaning and translations of terms.
  
• Bansa.org Kapampangan Dictionary
  http://www.bansa.org/dictionaries/pam/
  It seek to promote a community that works together to provide information and educate people about things such as the history, culture, language, art, and geography of the Philippines.