Arduino Tutorials
Leonardo Sample Sketches for different types of sensors

Documentation
Quick Start - To get started with library, tools needed and Arduino Development
Developer Guide - In depth details on library, sketches, MQTT client
API_Guide - API Details to get data from AT&T Cloud
AT Commands- List of AT Commands for 3G Shield SIM

Drivers 
3G Shield Drivers

Library
2lemetry library and examples sketches for Arduino

Teams
Team1 to Team 20 repository for Hackathon Projects and Demos