Advise needed

I have been looking on the web for an international time clock. One that would sit on my desk top and tell me the time in the US and in Europe.
When I had a look using Google there were hundreds but I am a bit reluctant to download anything unless it has been recomended.(dont know what could be attached.....see im learning [Linked Image])

Anyone care to recomend one?

Kenny

der Großvater