If you needs a dependency injection container for Ruby, try use syringe.

Yet another dependency injection container

Simple dependency injection for Ruby classes

Dependency Injection that allows you to generate pre-configured classes

SmartInject is a minimalist, flexible and efficient dependency injection for Ruby based on constructor injection, one of the most used method for DI. SmartInject is intented to be under your control. No magic here.

A thread-safe dependency injection container.

A small library to help you manage services with dependency injection.

A gem to handle dependency injection on ruby applications

ActiveDryDeps not modify constructor and support Dependency Injection for modules. Also you can import method from any object in your container. Adding extra dependencies is easy and improve readability your code.

A custom generator for creating features as modules using the dry.rb gems. The module registers a dry system provider, adds routes, view and migrations paths to the application configuration and registers the models and services for dependency injection.