Simple Rule Engine
DecisionRules.io
Drools
GoRules.io
OptaPlanner
Decisionable
Hyperion
Decisimo
Vim Python IDE
Simple Rule Engine
Vim Python IDENo features have been listed yet.
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.
Drools - Drools introduces the Business Logic integration Platform which provides a unified and integrated platform for Rules, Workflow and Event Processing.
GoRules.io - Open-source business rules engine for automating decisions
OptaPlanner - Mathematical optimization software
Decisionable - Make changes to your business rules tests faster. It's as ludicrously easy as updating a table.
Hyperion - An in-app, open-source design review tool for iOS apps