Wikimedia

Wikimedia is a global movement whose mission is to bring free educational content to the world.
Through various projects, chapters, and the support structure of the non-profit Wikimedia Foundation, Wikimedia strives to bring about a world in which every single human being can freely share in the sum of all knowledge.

The Wikimedia Foundation, Inc. is a nonprofit charitable organization dedicated to encouraging the growth, development and distribution of free, multilingual content, and to providing the full content of these wiki-based projects to the public free of charge. The Wikimedia Foundation operates some of the largest collaboratively edited reference projects in the world, including Wikipedia, a top-ten internet property.

www.wikimedia.org/

construction: http://en.wikibooks.org/wiki/House_Construction

Books: http://en.wikibooks.org/wiki/Subject:Books_by_subject

Cooking : Cooking reference

News: http://en.wikinews.org/wiki/Wikinews:Archives/All

Career & course contents  list: http://en.wikiversity.org/wiki/Category:Schools

Portals: http://en.wikiversity.org/wiki/Category:Portals

Pictures

General Full:  http://commons.wikimedia.org/wiki/Main_Page

Civil : http://commons.wikimedia.org/wiki/Category:Civil_engineering

Landscape: http://commons.wikimedia.org/wiki/Category:Landscapes

drawings : http://commons.wikimedia.org/wiki/Category:Drawings

Animation: http://commons.wikimedia.org/wiki/Category:Animations

Photos: http://commons.wikimedia.org/wiki/Category:Photographs

Buildings : http://commons.wikimedia.org/wiki/Category:Photographs_of_buildings

Buildings in art http://commons.wikimedia.org/wiki/Category:Buildings_in_art

symbols: http://commons.wikimedia.org/wiki/Category:Symbols_by_subject

Architecture: http://commons.wikimedia.org/wiki/Category:Architecture