The best bookmark page ever!!!

Physics
Hyperphysics
e-print archive (LANL mirror)
applet page for semiconductor physics and devices
Java applets for solid state
Physics Reference Material
physics

X-rays
Center for X-ray Optics

Space
Deep Space Network
3D Satellite Tracker (Java)

Schools
University of Michigan
Stanford University

Mechanical Engineering
Bold Stress Calculator
Random but helpful tables

Reference
Online Calculators

Earthquakes
Real-time Seismograms for California

Terahertz
Link from BESSY group
Jefferson Lab Links on T-ray
Picometrix
Links from Mittleman Group at Rice U.
Jefferson Lab IR FEL technical notes
LBNL proposed Coherent InfraRed CEnter

Imaging Excellent page on Microscopy and digital imaging

Traval
US Dept. of State, Bureau of Consular Affairs

German
German 5A Listening (restricted)