1) A calender with naked French politicians - by Roland Hours.
2) Is massively collaborative mathematics possible? - Gowers's weblog.
3) Thousands of video lectures from the world's top scholars - a terrific project.
4) Lab-initio, a lot of funny science pictures.
5) Italian history of physics archive - some old scientific journals are accessible after free registration.
6) Leningrad Siege: Now and then, from English Russia - shows how Saint Petersbourg waw looking during WWII.