Alpakka is a Reactive Enterprise Integration library for Java
A high velocity web framework
Deequ is a library built on top of Apache Spark
A Thrift parser/generator
Fast, testable, Scala services built on TwitterServer and Finagle
Lift Framework
Deploy and manage containers (including Docker) on top of Apache Mesos
Machine learning server for developers and ML engineers
Scala libraries for building and consuming RESTful web services