Text Resources, Online Library, References, Free Encyclopedias, Books, Dictionary, Open Content
Free text resources and references, features a free encyclopedia, aims at creating a library of free and open content licensed for free reproduction - literature, documentation and more.
http://www.thetexts.com/

Visual Dictionary and Encyclopedia
Where words are defined as pictures, for leaning the exact names of objects. Different from a dictionary or from encyclopedia because the images replace the words.
http://www.infovisual.info