Qlock offers a desktop download for Windows, but their Web site functionality is more than enough for anyone looking to quickly figure out what the current time is around the world. Their interactive map shows you which regions are experiencing sunlight and which regions are still in the dark, and all you have to do is point your mouse cursor at or type in the name of the city that you want to see the time for. If you want to get a close-up view of the location, then simply click on the area and zoom in and out as you see fit.
http://www.qlock.com/