Conductor is an event driven agentic workflow engine providing durable and highly resilient execution engine for applications and AI Agents
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Open source alternative to Auth0 / Firebase Auth / AWS Cognito
LangChain4j is an idiomatic, open-source Java library for building LLM-powered applications on the JVM. It offers a unified API over popular LLM providers and vector stores, and makes implementing tool calling (including MCP support), agents and RAG easy. It integrates seamlessly with enterprise Java frameworks like Quarkus and Spring Boot.
Apache ZooKeeper
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 engine for Java. It's open-source and distributed under the Apache license. Activiti runs in any Java application, on a server, on a cluster or in the cloud. It integrates perfectly with Spring, it is extremely lightweight and based on simple concepts.
Flyway by Redgate • Database Migrations Made Easy.
A compact and highly efficient workflow and Business Process Management (BPM) platform for developers, system admins and business users.
Main Liquibase Source
Brings the popular ruby faker gem to Java
Automated driver management and other helper features for Selenium WebDriver in Java
:gem:Collection of algorithms and data structures
TEAMMATES is a feedback management tool for education
Distributed Big Data Orchestration Service
OpenDDS is an open source C++ implementation of the Object Management Group (OMG) Data Distribution Service (DDS). OpenDDS also supports Java bindings through JNI.
A functional reactive framework for managing state evolution and side-effects.
Apache OFBiz is an open source product for the automation of enterprise processes. It includes framework components and business applications for ERP, CRM, E-Business/E-Commerce, Supply Chain Management and Manufacturing Resource Planning. OFBiz provides a foundation and starting point for reliable, secure and scalable enterprise solutions.
(Official) The DSpace digital asset management system that powers your Institutional Repository
Get rid of the boilerplate code in properties based configuration.
Binary Artifact Management Tool
(UNMAINTAINED) inspectIT is the leading Open Source APM (Application Performance Management) tool for analyzing your Java (EE) applications.
Port of a popular ruby faker gem written in kotlin. Generate realistically looking fake data such as names, addresses, banking details, and many more, that can be used for testing and data anonymization purposes.
Gravitee.io - OpenSource API Management
Learning Management System OpenOlat
Language-Natural Persistence Layer for Java