Drools is a rule engine, DMN engine and complex event processing (CEP) engine for Java.

Expression language and expression evaluation for Go

JetLinks 基于Java8,Spring Boot 2.x ,WebFlux,Netty,Vert.x,Reactor等开发, 是一个全响应式的企业级物联网平台。支持统一物模型管理,多种设备,多种厂家,统一管理。统一设备连接管理,多协议适配(TCP,MQTT,UDP,CoAP,HTTP等),屏蔽网络编程复杂性,灵活接入不同厂家不同协议等设备。实时数据处理,设备告警,消息通知,数据转发。地理位置,数据可视化等。能帮助你快速建立物联网相关业务系统。

The simple, stupid rules engine for Java

🐝 IoT Technical Guide --- 从零搭建高性能物联网平台及物联网解决方案和Thingsboard源码分析 ✨ ✨ ✨ (IoT Platform, SaaS, MQTT, CoAP, HTTP, Modbus, OPC, WebSocket, 物模型，Protobuf, PostgreSQL, MongoDB, Spring Security, OAuth2, RuleEngine, Kafka, Docker)

Lightweight, fast, stable, and programmable component-based rule engine/process engine. Component reuse, synchronous/asynchronous orchestration, dynamic orchestration, multi-language scripting support, complex nested rules, hot deployment, smooth refreshing. Let you improve your development efficiency!

A rules engine expressed in JSON

Rule engine implementation in Golang

Open-source infrastructure and data orchestration platform for risk decisioning

Rules engine for .NET, based on the Rete matching algorithm, with internal DSL in C#.

Lightweight data stream processing engine for IoT edge

Node-rules is a light weight forward chaining rule engine that can be used in JavaScript and TypeScript based projects.

The Hoa\Ruler library.

Rule engine/process engine, committed to solving flexible and complex hard-coded problems, for complex/flexibly changing business, provide a new abstract orchestration solution that is lightweight, high-performance and provides visual operation pages. Java规则引擎-ice，针对复杂/灵活变动业务，提供一个新的抽象编排解决方案，轻量级，高性能并提供可视化操作页面

天网决策引擎系统

JetLinks Core

Kogito Runtimes - Kogito is a cloud-native business automation technology for building cloud-ready business applications.

A rule engine written in Ruby.

Nop Platform 2.0基于可逆计算原理从零开始构建的采用面向语言编程范式的下一代低代码开发平台。包含基于全新原理从零开始研发的GraphQL引擎、ORM引擎、工作流引擎、报表引擎、规则引擎、批处理引引擎等完整设计，根据Excel数据模型自动生成GraphQL/REST/gRPC服务，定制化开发无需修改基础产品源码，支持GraalVM原生编译，中小企业可以免费商用。 a new generation of low-code platform based on the theory of reversible computation。

Open Source Data Management Software