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

Red-black trees in Chicken Scheme

JMS array collection handler for symfony doctrine persistent collection support.

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