a library which uses the map-reduce capabilities of mongodb to group entities based on tags.

sweep files under the rug

GUI abstraction library supporting Qt and KDE backends

RUIAN

Model definition for basic RUIAN object persisted in Postgres (loaded by fordfrog/ruian2pgsql)

Guice-ish dependency injection library for Ruby

calculate similarity between documents

a ruby binding for uinput.h

Call your Clojure using JRuby

API integration for Drool BRMS

Not only can this rule engine tell when rules conflict but it can be expanded in many ways, including as an automatic theorem solver

Ruler module implements a DSL that makes it easy to write a set of facts and rules. If you have some tricky conditional logic, Ruler can help clear it up.

Convert units

Creating a rails app from scratch using Ruby

An exercise to learn more about Rails under the hood. Rulerz is my version of the Rails-like gem built in the Rebuilding Rails book.

Rack middleware for connecting Rack applications to rules.io, with extensions for Rails 3 applications.

A simple business rules processor.

A simple implementation of a rule table with lots of metaprogramming.

Ruleur is a Ruby gem that provides a scalable and efficient way to manage your business rules. It uses the Rete algorithm, a well-known algorithm for efficient rule-based systems, to implement a Business Rule Management System (BRMS). With Ruleur, you can manage your rules in a straightforward and effective manner, without having to worry about performance or scalability issues.

Rulix lets you fold complex rulesets onto complex data structures; useful for validation, data sanitization, and mutation.