Squares is the best app for me. I'm using Pebble BTW.
Here's the list of what I get from it:
- day, weekday and month
- your local weather conditions
- missed calls count
- unread text messages count
- low battery condition
- connection status with the phone
- multi-language support: English, Spanish, French, German and Portuguese.
- appointments
Told 'ya it's great! 
