Twitter is without a doubt the best way to share and discover what is happening right now.

foursquare

Eventbrite gives you all the online tools you need to bring people together for an event and sell tickets.

YouTube is a place to discover, watch, upload and share videos.

San Francisco - User Reviews and Recommendations of Top Restaurants, Shopping, Nightlife, Entertainment, Services and More at Yelp

Facebook is a social utility that connects people with friends and others who work, study and live around them. People use Facebook to keep up with fr...

Vimeo is a respectful community of creative people who are passionate about sharing the videos they make. We provide the best tools and highest qualit...

Academia.edu helps academics follow the latest research.

Emporis is a leading database for building information worldwide. You find information about construction projects, architecture, the building industr...

Online shopping from the earth's biggest selection of books, magazines, music, DVDs, videos, electronics, computers, software, apparel & accessori...

Readcube is a free, simple, academic software and reference manager for researchers. Read Cube helps researchers organize, annotate and stay on top o...