ChatNow is a really cool chat app for the Nintendo 3DS (and more devices, soon) with Miis as avatars, DMs, voice and video calls, and a fun Camera Mode to take pictures on 3D with your Miis.

If enabled, you can recieve Notifications from the ChatNow Team when new cool stuff happens, and a blue dot in the app icon if you have recieved a DM from a friend.