NetChronometer 1.4.8 (Mac)
Source: Jeremy Kezer
NetChronometer will synchronize the date and time of your Macintosh with a highly accurate network time server over the internet. You can even set up NetChronometer to synchronize with the time server periodically, for unattended operation. Features include: You can manually synchronize the clock, or configure NetChronometer to sync it periodically. Contains a large list of time servers world wide, or you can customize it (even use an in-house NT server!). Stand-alone application - doesn't consume memory when it's not running, unlike Apple's Time Synchronizer extension (introduced in Mac OS 8.5). Fully Mac OS 8.5 & 9.0 compatible - it's Appearance Manager savvy!