Free synchronous browser games

Anybody know of any good games you can play straight from the browser, (or through Facebook etc.) where you compete in real time against peers who are not your friends. I’m looking for wordgames, strategy, puzzle type things not things needing good reflexes. I used to play Scrabble on Facebook until the global version got taken over and you can no longer play 2 minute limit games without using purchasable tokens.

I’m not interested in any game you play asynchronously, I want to basically win or lose in 10 minutes or less, don’t want turns that last days. One I enjoy is Wordox on Facebook but you can only lose once per day on the free chips; something similar to that would be good, as would a Scrabble clone set up for short time limits.