Here's a list of other online tools:
The newest web application from Google allows a group of people to share the same conversation, and link images, maps and video.
Uses a mobile phone's GPS to enable a sort of scavenger hunt among friends in their neighborhood. People can let friends know when they've "checked-in" to places within the neighborhood and their experience.
A site where users can ask and answer questions. Want to know what other people think about your new sneakers? Take a photo and ask. Need help deciding who to take to the prom? Let the online world decide.
Allows users to create a profile of their professional experience to help build business connections. LinkedIn has more than 70 million members in more than 200 countries.
A site where people write reviews of places from restaurants to spas and add entries to their to-do list.
- Jose Moreno and