invokedynamic

JRuby, an implementation of Ruby on the JVM

Golo - a lightweight dynamic language for the JVM.

Cojen/Maker is a lightweight, full-featured, low-level dynamic Java class generator designed for ease of use.

Welcome to BoxLang: A Modern Dynamic JVM Language and Framework

Thor Hammer and a way to express invokedynamic in Java

Making reflection fast and simple

Library for bean conversion