Encyclopedia.com
"Free access to reference works such as The Columbia Encyclopedia, Oxford's World Encyclopedia, and the Encyclopedia of World Biography and many others. Contains free citations and excerpts to periodical articles. You have to pay money to read full text of articles."
http://encyclopedia.com/
Scholarpedia
"Scholarpedia is a peer-reviewed open-access encyclopedia written and maintained by scholarly experts from around the world. Scholarpedia is inspired by Wikipedia and aims to complement it by providing in-depth scholarly treatments of academic topics."
http://www.scholarpedia.org/article/Main_Page
The Encyclopedia of Earth
"A comprehensive, authoritative, and thorough resource all about our Earth and relationship to it. Articles written by experts and scholars"
http://www.eoearth.org/
Wikipedia
"Wikipedia is a multilingual, web-based, free-content encyclopedia project based on an openly editable model."
http://www.wikipedia.org/
WikiPilipinas
“WikiPilipinas is an online, free content encyclopedia on the Philippines. WikiPilipinas features encyclopedic articles covering its 12 Main Portals, namely; Government and Politics, Philippine History, Media and Entertainment, Culture and Arts, People and Society, Business and Economy, Geography and Travel, Philippine Communities, Religion and Beliefs, Science and Technology, and Sports and Leisure. In addition, the encyclopedia also has portals on special topics such as Philippine Music, Native Cuisine, Traditional Filipino Games, and many more.“
http://www.wikipilipinas.org/
