Marx/Engels Internet Archive  
   Archive of Karl Marx and Fredrick Engels writings, speeches and letters
   http://www.marxists.org/archive/marx/index.htm

Socialism: Utopian and Scientific  
   Engels' most concise exposition of Marxism. Next to "The Communist Manifesto" this work is probably the most widely read introductory text on socialism.
   http://www.marxists.org/archive/marx/works/1880/soc-utop/index.htm

Origins of the Family, Private Property, and the State  
   On line version of this key work by Engels.
   http://www.marxists.org/archive/marx/works/1884-fam/index.htm

Modern History Sourcebook: Engels: Industrial Manchester, 1844  
   From Friedrich Engels, The Condition of the Working-Class in England in 1844.
   http://www.fordham.edu/halsall/mod/1844engels.html

Conditions of the Working-Class in England  
   Fredrich Engel's widely read analysis of the effects of the industrial revolution on English life. An indictment of capitalism's oppression of workers in Victorian England.
   http://www.marxists.org/archive/marx/works/1840/cond-wce/index.htm