ObjectInjection is dependency injection container.

A lightweight dependency injection container for Ruby

Simple dependency injection container

Nurse, for your dependency injection. Dependency injection container

Encase is a library for using dependency injection within ruby applications. It provides a lightweight IOC Container that manages dependencies between your classes. It was written to assist with wiring of domain objects outside Rails applications to enable faster test suites.

Guice inspired dependency injection

Simple Dependency Injection for Ruby. Find yourself passing dependencies in to the initalizer? Medicine makes this declarative.

add dependency injection to dry-container

Injection is a simple dependency injection gem for rails3. It allows you to inject objects into your controllers and observers which have been described in a yaml file (config/objects.yml).

A simple dependency injection library for Ruby.

This is an easy tool to acomplish basic dependency injection in Ruby

Utility for automatic dependency injection with support for aliases

MinDI is minimalist in that it attempts to map concepts of dependency injection into basic ruby constructs, rather than into a layer of specialized constructs.

Dependency Injection for Rails

Simple dependency injection framework for ruby applications

StructureMap is a Dependency Injection / Inversion of Control tool for .Net that can be used to improve the architectural qualities of an object oriented system by reducing the mechanical costs of good design techniques

An extension to Sinatra enabling dependency injection

A dependency injection framework for Ruby, which allows you to register dependencies and access them anywhere in your program

A Sinatra wrapper for a fully customizable Dependency injection system

Morphine is a lightweight dependency injection framework for Ruby. It uses a simple Ruby DSL to ease the pain of wiring your dependencies together.