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

Small set of tools for JVM troublshooting, monitoring and profiling.

Benchmark comparing serialization libraries on the JVM

Log analyser / visualiser for Java HotSpot JIT compiler. Inspect inlining decisions, hot methods, bytecode, and assembly. View results in the JavaFX user interface.

A sampling JVM profiler without the safepoint sample bias

Open source business application platform for fast development

jHiccup is a non-intrusive instrumentation tool that logs and records platform "hiccups" - including the JVM stalls that often happen when Java applications are executed and/or any OS or hardware p…

https://openjdk.org/projects/code-tools/jcstress

Java Annotation Indexer

Benchmarks for queries over continuous data streams.

Automatically exported from code.google.com/p/memory-measurer

JUnit Rule for providing an embedded in-memory database for your tests

SubZero - Fast Serialization for Hazelcast

Tool to visualize and maintain the composition of java code.