NxBRE
Drools
OptaPlanner
DecisionRules.io
GoRules.io
MiniZinc
Simple Rule Engine
Decisionable
Vim Python IDE
NxBRE
Vim Python IDENo features have been listed yet.
Drools - Drools introduces the Business Logic integration Platform which provides a unified and integrated platform for Rules, Workflow and Event Processing.
OptaPlanner - Mathematical optimization software
DecisionRules.io - Business rule engine that lets you create and deploy business rules, while all your rules run in a secure and scalable cloud. Unlike other rule engines, you can create your first rule in 5 minutes and make 100k decisions in a minute via API.
GoRules.io - Open-source business rules engine for automating decisions
MiniZinc - MiniZinc is a free and open-source constraint modeling language.
Simple Rule Engine - DotNet simple BRMS XML rule engine