Free Bitcoins
BitVisitor
BitVisitor pays you bitcoin for visiting websites. BitVisitor shows you each website for 5 minutes (during which time you can check out the site), and pays you for each site you visit. Between sites, you're required to enter a captcha.
Coin Tube
CoinTube is a simple service where you can earn free bitcoin by watching videos and entering captcha checks.
Bitcoin Get
Bitcoin Get is a crowdsourced bitcoin site. What this means is that once you've created an account, you can complete a variety of tasks (perform web tasks, watch videos, etc.), and get paid in bitcoin for doing so. One of the best free bitcoin sites around.
I Want Free Bitcoins
I Want Free Bitcoins is a site that pays you bitcoin for completing various offers. These tend to include things like: playing a simple web game for a few minutes, filling out a Facebook survey, etc. There are a mix of offers the site supports, so there's quite a lot of variety.
CoinVisitor
CoinVisitor pays you bitcoin for viewing websites and solving captcha challenges. What's great about this service is that you only need to view the sites for 10 seconds at a time, so it's a quick process.
Earn Free Bitcoins
Like BitVisitor, Earn Free Bitcoins pays you bitcoin for visiting websites.
Bitcoin 4 You
This is another site viewing service, through which you visit sites for 3 minutes at a time, and receive a small amount of bitcoin for each website view.
BitBin
BitBin is a pastebin service which allows you to share snippets of text (usually programming code) publicly, and shares the site's ad revenue with you (in Bitcoin) based on the amount of views your snippets get.
