Android Developer sites maintained by the mobile manufactures:
- Google: http://developer.android.com/index.html
- HTC: http://developer.htc.com/
- Sony: http://developer.sonyericsson.com
- LG: http://developer.lgmobile.com
- Samsung: http://innovator.samsungmobile.com/
- Motorola: http://developer.motorola.com/
- Dell: http://opensource.dell.com/ OR http://linux.dell.com/git/
- Texas Instruments: http://omappedia.org/wiki/OMAP_Android
- Qualcomm: http://developer.qualcomm.com/dev/android