The third Humble is still on sale for 4 days and 21 hours. For those of you don't know what it is, it's 6 games and you pay whatever price you want for them all with a minimum of $1. If you spend more than the average amount (which atm is $5.32) that's been paid you get all the games in the second humble Bundle as well.
They also give you a code that allows you to link it with your Steam Account.www.humblebundle.com
I didn't see a topic already made about this so sorry if it's old news. Just trying to contribute.