Thinkwalks is a community exploration that mixes groundbreaking research with a social justice ethic. It's sharing 133 places where you can discover the hidden secrets and forgotten histories that make SF like no other place on the planet.
Urban Spoon - This is basically THE way we find and choose restaurants when we're travelling & when we're looking for a new place in Greenville. It's helped us find some absolutely DELICIOUS places we never would have tried. I use the free phone app.
ShareThis powers the social web with social sharing buttons: an all-in-one widget that allows people to share content on the web via e-mail or social networks such as Facebook, Twitter, Linkedin, and Google+. ShareThis provides each online publisher with a rich set of user data analytics to understand the social behaviors of its users, and these insights help advertisers to deliver personalized online advertising campaigns.