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 friends, upload an unlimited number of photos, post links and videos, and learn more about the people they meet.
Google+ aims to make sharing on the web more like sharing in real life. Check out Circles, Events and Hangouts, just a few of the things we've been working on.
Diigo is a multi-tool for personal knowledge management
dramatically improve your workflow and productivity
easy and intuitive, yet versatile and powerful
Built from the ground up for social, Ning’s scalable hosted platform gives you the tools and expertise you need to publish and connect with your community – all in one place. Easy. Powerful. Affordable.
Wiggio is a completely free, online toolkit that makes it easy to work in groups. With Wiggio you can: - keep shared calendar (with text message reminders) - poll group in real-time - send mass text messages - store files in one common folder - setup group conference call - many others!