Get Bitcoins for having a tab open in your browser for 5 minutes.
It is easy like this:
1. enter your Bitcoin address
2. solve the captcha
3. watch the site
4. click the next button
5. repeat this till you have 100mbtc, then they pay out
 
Link: http://www.bitvisitor.com/?ref=1PNjssSDv1M29Yqx13mujm9QuQkp27VLPd