War of Empires is a fun little game to waste time on. :)
Its no GWs, but it is slightly addicting.
War of Empires Sign Up
All free of course. :D
Hint: Make use of the help button up top when you are first starting...it's actually useful. Peasents are per day, while resources are per 10 minutes--so be careful when choosing professions for the workers.
about: It's a medieval game based on real time. Every 10 minutes is a "turn" where you get money and an extra spy/attack turn that you can use. You pretty much try to get troops, money, spy on, and rob other people. It is similar to a game called Planetarion I used to play but it is not quite as deep. I'm still giving it a go anyway though because it's pretty fun. Bobangry's my name in the game too. Let's kill us some non-guildwaries!