RingReef is the app that lets you have fun communication by sharing photos and chatting.
You can send messages to each other in real-time like a chat. When you receive a message, you are notified via push notification. You can always get in touch with members in your group.
Not only sending messages, you can also upload photos to groups. You can share the photos on groups' albums in a great view format. You don't need to worry about arranging the albums manually.
As RingReef supports Facebook Connect and Twitter OAuth, you can start using it as soon as you download without registering. You can connect with or invite your SNS's friends on RingReef.