ZoneTrekker
View world clocks, time zones, and a day and night map, and keep track of public holidays. This program is ideal for businesspeople, travelers, and anyone who wants to stay in touch with colleagues, family, or friends around the world. It displays the current local times of all selected cities... You can also compare time zones of any two locations on any day by viewing their daily calendars side by side. ... You get easy access to time zones in more than 100,000 locations and public holiday dates for more than 70 countries.
http://www.esotech.net/software/zonetrekker/ZTTrial.exe - 3Mb - Download - Screenshot

PalmaryClock Wireless Edition for Treo 600/650
PalmaryClock Wireless Edition s not just an improved clock, it is a technological breakthrough. Your Palm can now be not only a powerful organizer but a real-time assistant in your business! Nowadays it is very important to have the latest reliable information, and with the help of PalmaryClock... Features - Weather Forecast for 1300 cities (provided by AccuWeather. ... com) - Currency Converter - Atomic Time Syncronization - Wireless autoupdate - An ability to specify the button to switch on the device and automatically start PalmaryClock.
http://www.palmarysoft.com/products/clock/wireless/PClockW_v10.zip - 2Mb - Download - Screenshot

PalmaryClock Wireless Edition
PalmaryClock Wireless Edition s not just an improved clock, it is a technological breakthrough. Your Palm can now be not only a powerful organizer but a real-time assistant in your business! Nowadays it is very important to have the latest reliable information, and with the help of PalmaryClock... - An ability to launch an application or timer on alarm - New skins with calendar - User's skins - User's backgrounds - Easily adjustable and intuitive alarms and timers control from the main clock screen - Slideshow mode - Personal user settings for every skin - Analog clock - Digital clock -...
http://www.palmarysoft.com/products/clock/wireless/PClockW_v102.zip - 3Mb - Download - Screenshot