Mixin is an online social-calendar application that allows you to share your agenda with your friends and tell them where you will be, and what you’ll be doing at any specific time in the future. You are able to post these agenda updates from your current calendar application, by email, SMS, IM or via Twitter.
Compare your agenda to your friend’s ones and propose a time to meet or a group activity based on when they are all free. For example, if you’d like to go out to dinner with your friends, check when they will all be free and then suggest a time and date. Your friends will be able to see your invitation and respond in the negative or the affirmative.
Mixin.com In Their Own Words
“mixin lets you share your daily activities and intentions to get together more often with your friends.”
Why Mixin.com It Might Be A Killer
This is a very robust application and it could really catch on amongst groups of friends looking for a more organized and efficient way of tracking what others are up to and for making plans to see each other.
Some Questions About Mixin.com
Is there a way to manage multiple groups of friends without registering for multiple accounts? Many of us have more than one group of friends and it would be nice to be able to control who sees what. 
