Free universal database tool and SQL client

Vert.x is a tool-kit for building reactive applications on the JVM

LensKit recommender toolkit.

A JVM-based Erlang VM

erlang tracing for the masses

Automation of Interactive Brokers TWS. You can download the latest release here: https://github.com/ib-controller/ib-controller/releases/latest

IzPack - Source Code

Actors for Java

Java implementation of NTRUEncrypt and NTRUSign

Implementation of 'Recordinality' cardinality estimation sketch with distinct value sampling

Erlang to Java adapter/facade; access neo4j from within Erlang

CLONE OF: Kilim - a message-passing framework for Java that provides ultra-lightweight threads

an Erlang-Gremlin/Blueprints interface (neo4j/sail/etc...)