Useful link

Component Distributors

1. RS-online
2. Mouser
3. Digikey
4. Sparkfun
5. Adafruit
6. SeeedStudio
7. Banggood
8. DFRobot

Engineering Software

1. PADS
2. Altium Designer
3. Autocad
4. µVision IDE
   

Mobile Development

1. Android
2. iOS
3. Window Phone
   

Specification

1. Bluetooth
2. HDMI
3. I2C bus
4. NMEA 0183 (GPS statement)
5. Near field communication (NFC)
6. SerialATA
   
7. Secure digital
8. USB
9. Qi Wireless charging
10. Zigbee