A simple joystick/Virtual D-pad done with deep research
Its heavily inspired from the article http://www.gamasutra.com/view/feature/6323/a_guide_to_ios_twin_stick_shooter_.php?print=1
You can download it and use for your project and if you found some cool ways to use this please share those code with us.
Thanks.
Note: This Project/Package need Standard Assets(download: https://www.assetstore.unity3d.com/en/#!/content/32351) from Unity for CrossPlatform Input.