If, like me, you’re frequently keeping track of events and correspondents in various parts of the world, a world clock application is just about a must. For the last year or so I’ve been using World Time, “The Ultimate Virtual Timepiece,” according to the Web page. I haven’t had occasion to test any others as complex (and don’t care to), so I can’t say they’re wrong. I like the price: free, free, free.

World Time 6 is the latest version. It offers “unlimited configurable clocks, each with its own time zone, configurable Daylight Saving Time, Lat Long, and description in a 12 or 24 hour analog/digital user configurable display, that minimizes to the system tray…” and a whole lot more besides. It takes a bit of fiddling to learn the interface, but it’s not all that difficult to set up a nice array of clocks for different cities of the world, plus universal time. If you don’t have a program that synchronizes your computer clock with the National Institute of Standards and Technology atomic clock, World Time will do that, too.

Minimized, World Clock takes up a hair more than one MB of RAM; about 10 MB when visible. If you need a multiple time zone application, this one is worth a good look.