Encyclopedias

• By Subject

• Blogs@

• 1902 Encyclopedia  - Articles and illustrations from the Encyclopaedia Britannica, 9th Edition (1875) and 10th Edition (1902). Searchable by keyword and browsable by subject index.
• Again, But Slower  - Displays Wikipedia articles and their simpler counterparts side by side.
• Encyclopedia Britannica  - Provider of learning knowledge products through its online resources and distributed books and products.
• Encyclopedia Smithsonian  - Offers images, video and sound files from dozens of Smithsonian libraries, archives, and museums.
• Information Please  - Knowledge resources featuring almanacs, atlases, encyclopedia, discitonary, thesaurus, and white pages.
• Knol  - User-written knowledge-base with comments sections for all articles.
• Mashpedia  - Offers a mashup of Wikipedia articles, Twitter tweets, and breaking news.
• Navify  - Aims to enhance Wikipedia content by adding more images and videos to articles.
• Qwiki  - Encyclopedic guide featuring articles on various topics with several accompanying photos and maps.
• Rudiments of Wisdom  - Thousands of cartoons by Tim Hunkin, offering simple information in many different categories including biology, music, psychology, music, language, religion and engineering.
• Scholarpedia  - Features a peer-reviewed open-access encyclopedia, containing knowledge that is curated by communities of experts.
• Visipedia  - Visual encyclopedia project that is a collaboration between Caltech and UCSD.
• Wikia  - Offers a large assortment of topical wikis, as well as the traditional ability to edit them.
• Wikipedia  - Free open-source multilingual encyclopedia with volunteer editors.
• World Book, Inc.  - Official site promoting its excellence in the production of award-winning encyclopedias, reference sources, and multimedia projects for the home and schools.