Spezify
A visual search engine that pulls its results from all sorts of media and sites. The end result is a intuitive clickable visual starting point on your chosen topic.
http://www.spezify.com

Found
This site which compiles notes, pages, letters and cards found on the street and posts it in the net runs the gamut of human emotion and is at times very, very funny.
http://www.foundmagazine.com

Issuu
A digital magazine service which houses free magazine issues from all over the world counts back issues of Ireland music magazines State and Analogue amongst its publications.
http://issuu.com