vʌvr (formerly called Javaslang) is a non-commercial, non-profit object-functional library that runs with Java 8+. It aims to reduce the lines of code and increase code quality.

GWT module for Vavr

Gson datatype module for Vavr

JMS array collection handler for symfony doctrine persistent collection support.

Red-black trees in Chicken Scheme

Introduction to Scala and functional programming collections: list, stream and tree.