NicTime 1.0 (Windows)

From the developer: ""NicTime maintains the accuracy of your computer's clock by syncronizing with one of several NTP Time Servers located in the United States. Precision is within .5 seconds. ""NicTime displays the local time, the retrieved server time, and the difference. You then have the option to set your computer's time in sync with your selected time server. If NicTime is unable to connect to a time server, it will attempt 7 additional time servers until the current time is retrieved. You can also automate the execution of NicTime to execute at startup, and maintain the accuracy of your computer's time in the background.""