7. GPS-GPRS-GSM-Shield-V3.0GPS/GPRS/GSM Shield V3.0 using SIM908 chipset. This library aims to provide usability for this chips functionality inside your sketch
8. BlunoAccessoryShieldDemoThrough this demo You can use the BLUNO to connect with the mobile device and Accessory shield to show the demo.
16. DTMFDTMF Decoder and Encoder shield for Arduino