Time.is

Exact time for any time zone

Reviews
Discussion
While I like the flat design, the big and bold time is difficult to read on my computer. I shouldn't have to move my eyes left to right to read the time, imho. :)
I usually just use Google to find out the time in another place; e.g. https://www.google.com/search?q=...
I'm with @_jacksmith. Quick Google search is my goto for finding out local times.
I've also found Wolfram Alpha to be freakin' awesome at structured data orientated questions, which Google often doesn't pick up. e.g. on Wolfram alpha I can search "10am GMT in PST" and have it return "3am" as the result: http://www.wolframalpha.com/inpu... Google returns a load of junk for the same query. I think Google should probably by Wolfram Alpha/clone it for some obvious searches like this, which would be highly useful for the vast majority of people searching for search a query.