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

Hystrix is a latency and fault tolerance library designed to isolate points of access to remote systems, services and 3rd party libraries, stop cascading failure and enable resilience in complex di…

Zipkin is a distributed tracing system

The official home of the Presto distributed SQL query engine for big data

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

Logstash - transport and process your logs, events, or other data

Apache Druid: a high performance real-time analytics database.

Change data capture for a variety of databases. Please log issues at https://issues.redhat.com/browse/DBZ.

📈 Capturing JVM- and application-level metrics. So you know what's going on.

Apache Beam is a unified programming model for Batch and Streaming data processing.

Free and open log management

Alluxio, data orchestration for analytics and machine learning in the cloud

「可视化报表，DataV、帆软的开源替代」积木报表是一款类Excel操作风格，在线拖拽设计的报表工具。功能涵盖: 报表设计、打印设计、图形报表、仪表盘门户设计、大屏设计等，完全免费！秉承“简单、易用、专业”的产品理念，极大的降低报表开发难度、缩短开发周期、解决各类报表难题。

configuration library for JVM languages using HOCON files

Hazelcast is a unified real-time data platform combining stream processing with a fast data store, allowing customers to act instantly on data-in-motion for real-time insights.

AI + Data, online. https://vespa.ai

Flink CDC is a streaming data integration tool

A scalable, distributed Time Series Database.

MapDB provides concurrent Maps, Sets and Queues backed by disk storage or off-heap-memory. It is a fast and easy to use embedded Java database engine.

Apache Calcite

Ribbon is a Inter Process Communication (remote procedure calls) library with built in software load balancers. The primary usage model involves REST calls with various serialization scheme support.

Fork of tagtraum industries' GCViewer. Tagtraum stopped development in 2008, I aim to improve support for Sun's / Oracle's java 1.6+ garbage collector logs (including G1 collector)

CrateDB is a distributed and scalable SQL database for storing and analyzing massive amounts of data in near real-time, even with complex queries. It is PostgreSQL-compatible, and based on Lucene.

High performance non-blocking webserver

Simple Binary Encoding (SBE) - High Performance Message Codec

Soot - A Java optimization framework

Java agent that enables class reloading in a running JVM

Compiles Java bytecode to JavaScript, WebAssembly and C

Library for configuration management API

Stream summarizer and cardinality estimator.