By downloading the SDK from this page you have everything you need to create and test your App.
Note: Smart TV Alliance SDK 5.0 replaces SDK 4.0/3.0/2.5/2.0 - the SDK 5.0 supports creating and validating applications for both Smart TV Alliance Specification version 5.0, version 4.0 (which is aligned with Smart Home v1.0 specification, mandates Audio track selection and TTML subtitle support with inband delivery via Smooth Streaming, some option features like Network Service Discovery) as well as Specification version 3.0 (device capability API, exit API, HTML5 enhancements), 2.5 (DIAL multiscreen) and 2.0.
|Smart TV Alliance SDK Win 5.0.0 (708 MB)||Download|
|Smart TV Alliance SDK Mac 5.0.0 (1031 MB)||Download|
|Smart TV Alliance SDK Ubuntu 5.0.0 (1103 MB)||Download|
|Smart TV Alliance SDK Open Source 5.0.0 (2243 MB)||Download|