Hazelcast - Clustering and highly scalable data distribution platform for Java
Apache Spark - Apache Spark is an engine for big data processing, with built-in modules for streaming, SQL, machine learning and graph processing.
Apache Storm - Apache Storm is a free and open source distributed realtime computation system.
Lightbend Akka Platform - Lightbend Fast Data Platform is the easy on-ramp to successful streaming Fast Data applications.
Redis - Redis is an open source in-memory data structure project implementing a distributed, in-memory key-value database with optional durability.
Goka - Goka is a distributed stream processing library for Apache Kafka written in Go.