At Homido we are very excited about VR games and want to help developers to create awesome apps.
Below are two SDK that will help you develop new games:

We also plan to develop plugins compatible with the Google Cardboard SDK. We will let you know as soon it is available

If you are an APP developer and you would like to submit your VR APP to Homido Center (our catalog app on iOS/Android), please send us a message on our Contact Form with the subject "Developer (Homido Center)".