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
5. Atmel studio
6. Fritzing

Mobile Development

1. Android
2. iOS
3. Window Phone
   

Programming language

1. C Language
2. Objective-C
3. Swift Language
4. Java
5. Kotlin
6. Python
   
7. Javascript

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
11. LoRa (Long Range)
    
12. I3C wiki, MIPI Alliance