MY VILLE - FLOATMAN HOME PAGE

http://quequero.org/Home
The best Italian reversing site [lang IT]
http://www.crackmes.de
fantastic crack-me database, the best playground of the world
http://www.openrce.org
Open Reverse Code Engineering community; international site full of really good articles about reverse engineering from all over the world
http://www.reteam.org
The Reverse Engineering Team; another very good site with an great reversing-tools collection
http://www.program-transformation.org
Very complete wiki dedicated to reversing, clustering, software engineering etc.
http://www.woodmann.com/forum
Official supporting site for OllyDBG and plugins.