Free and Open Source, Distributed, RESTful Search Engine

RxJava – Reactive Extensions for the JVM – a library for composing asynchronous and event-based programs using observable sequences for the Java VM.

Netty project - an event-driven asynchronous network application framework

Graphs for Everyone

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

Guice (pronounced 'juice') is a lightweight dependency injection framework for Java 11 and above, brought to you by Google.

Distributed Graph Database

Java runtime metadata analysis

Process Orchestration Framework

Apache TinkerPop - a graph computing framework

A Graph Traversal Language (no longer active - see Apache TinkerPop)

Lean & powerful HTTP apps

A Property Graph Model Interface (no longer active - see Apache TinkerPop)

HTTP web applications for Vert.x

An Object to Graph Framework (no longer active - see Apache TinkerPop)

Various testcases for some open source projects

Hebrew analyzer plugin for elasticsearch

Antiquity - A versioned graph extension.

Service Factory implementation

A small, java based toolkit for signing digital content.