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

Apache Flink

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…

Redisson - Valkey & Redis Java client. Real-Time Data Platform. Sync/Async/RxJava/Reactive API. Over 50 Valkey and Redis based Java objects and services: Set, Multimap, SortedSet, Map, List, Queue,…

Suite of tools for deploying and training deep learning models using the JVM. Highlights include model import for keras, tensorflow, and onnx/pytorch, a modular and tiny c++ library for running mat…

Generate diagrams from textual description

The Metadata Platform for your Data and AI Stack

Activiti is a light-weight workflow and Business Process Management (BPM) Platform targeted at business people, developers and system admins. Its core is a super-fast and rock-solid BPMN 2 process …

CoreNLP: A Java suite of core NLP tools for tokenization, sentence segmentation, NER, parsing, coreference, sentiment analysis, etc.

Web-based notebook that enables data-driven, interactive data analytics and collaborative documents with SQL, Scala and more.

Statistical Machine Intelligence & Learning Engine

Apache NiFi

OrientDB is the most versatile DBMS supporting Graph, Document, Reactive, Full-Text and Geospatial models in one Multi-Model product. OrientDB can run distributed (Multi-Master), supports SQL, ACID…

Maestro: Netflix’s Workflow Orchestrator

A Graph Traversal Language (no longer active - see Apache TinkerPop)

A large-scale entity and relation database supporting aggregation of properties

Oryx 2: Lambda architecture on Apache Spark, Apache Kafka for real-time large scale machine learning

Open Source ML Model Versioning, Metadata, and Experiment Management

Elassandra = Elasticsearch + Apache Cassandra

JSON to JSON transformation library written in Java.

Port of LevelDB to Java

Hopsworks - Data-Intensive AI platform with a Feature Store

Structurizr for Java

Blazegraph High Performance Graph Database

Takes third-party HTML and produces HTML that is safe to embed in your web application. Fast and easy to configure.

Solandra = Solr + Cassandra

Redis embedded server for Java integration testing

REST web service for the true real-time scoring (<1 ms) of Scikit-Learn, R and Apache Spark models

The OWASP Java Encoder is a Java 1.5+ simple-to-use drop-in high-performance encoder class with no dependencies and little baggage. This project will help Java web developers defend against Cross S…

Generic Data Ingestion & Dispersal Library for Hadoop