# Drools

Tool · [Standard tools and platforms](https://ecosystem.samcarlton.com/tools)

Also called: Drools rules engine, JBoss Drools

An [open-source](https://ecosystem.samcarlton.com/open-source) business rules engine written in Java, now part of the Apache KIE project. [Teams](https://ecosystem.samcarlton.com/microsoft-teams) write rules, such as who qualifies for a discount, separately from the rest of the code.

**For example:** An insurance software team keeps its eligibility rules in Drools so analysts can change them without a full [release](https://ecosystem.samcarlton.com/deployment).

Official site: <https://www.drools.org>

## Connects to (3)

- [Back end](https://ecosystem.samcarlton.com/back-end): The part of an app that runs out of sight on a server.
- [Open source](https://ecosystem.samcarlton.com/open-source): Software whose code is published for anyone to read, use and build on, under a license that sets the rules for doing so.
- [Code](https://ecosystem.samcarlton.com/code): Exact written instructions that tell a computer what to do, step by step.

Map view: https://ecosystem.samcarlton.com/drools