Probably a good time to mention the CNCF Serverless Workgroup and the Serverless landscape. It lists all the Kubernetes-native Serverless frameworks as well as the proprietary ones. OpenWhisk was one of the first projects in this space and is written entirely in Scala. Good to see a Kubernetes integration emerging. https://medium.com/memory-leak/serverless-cloud-native-lands... Other notable projects: Oracle's Fn, Bi…
https://developers.redhat.com/blog/2017/06/07/red-hat-and-ap...
They're really invested in Kubernetes with their open source OpenShift PaaS.