The Scala SDK v0.1.0 has been released.
This version enables transaction submission and ~95% of Horizon querying capabilities.
The SDK project uses generative testing as well as integration testing against the Stellar test network and currently has 99% test coverage.
The API is designed with Scala developers in mind and at this early stage is open to change based on real-world use. Feedback is welcomed. If you are familiar with Scala, I kindly invite you to take a look and tell me what you think.