Select a part of the world on a map and find the time from GMT
Time Ticker and the time tickers

Timeline with autoupdating times,
International Time Zones
The Personal World Clock

Way cool site, World Time Zones, clocks update continually.
There is a clock for each time zone.

World Map with times, use refresh on browser to update times, World timezones

U.S. Map with timezones, The Official U.S. Time

Infromation and pictures of the Cesium Clock in Boulder, Colorado,
NIST F-1 Cesium Fountain Clock

NIST - The National Institute of Standards and Technology