Material properties:
      IOFFE Database
      Landolt-Börnstein
      Atomic Reference data for electronic structure  calculations
      Web-Elements
Useful courses:
      Quantum Transport course by Prof. Datta
      Electricity and Magnetism course by Prof. Lewin
      Physics for future presidents by Prof. Muller
Java Applets:
       Semiconductor Simulation Applets
Information:
        World clock
        Wolfram online calculator!
          
ART:
        Web Museum, Paris
        Olga’s Gallery
        Vincent van Gogh Gallery 
        Astronomy Picture of the day
        Nature Photography
Energy  Science   Nanotechnology & Imagination Lab