Alpakka is a Reactive Enterprise Integration library for Java
Build concurrent, distributed, and resilient message-driven apps
Compositional, streaming I/O library for Scala
The Streaming-first HTTP server/module of Akka
Memory optimized analytics database, based on Apache Spark
Apache Spark Connector for Azure Cosmos DB
Graphcool is an open-source backend development framework
Streaming MapReduce with Scalding and Storm