The Cornerstone SDK developer guide can be found here.
Cornerstone Runtime Downloads
Cornerstone runtime is required to run applications developed with Cornerstone SDK. It is a smaller download than the Cornerstone SDK because it does not include the headers and libraries required to develop applications.
- Cornerstone Runtime 2.1.2 for Ubuntu 14.04 (64-bit)
- Cornerstone Runtime 2.1.2 for Windows (64-bit)
- Cornerstone Runtime 2.1.2 for OS X Yosemite
Cornerstone SDK Downloads
Cornerstone SDK includes the headers and libraries required to develop Cornerstone applications. The Cornerstone runtime is included in the SDK.