Kzmlabs Flink StateFun — actively maintained continuation of the Stateful Functions framework for building distributed stateful applications and event-driven microservices on Apache Flink 2.2.0 with Java 21. Provides a function-as-actor programming model with durable state, exactly-once messaging, Kafka and Kinesis ingress/egress, and Kubernetes-native deployment via the Flink Kubernetes Operator.