Copland is an "Inversion of Control" (IoC, also called "Dependency Injection") container for Ruby, based heavily on the HiveMind container for Java. It supports both type-2 (setter) and type-3 (constructor) injection.

Needle is a Dependency Injection/Inversion of Control container for Ruby. It supports both type-2 (setter) and type-3 (constructor) injection. It takes advantage of the dynamic nature of Ruby to provide a rich and flexible approach to injecting dependencies.

Constructor-based dependency injection container using YAML input.

ObjectInjection is dependency injection container.

S2Container is a Dependency Injection(DI) and Aspect Oriented Programming(AOP) implementation, written in Ruby

Simple dependency injection framework for ruby applications

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

A lightweight dependency injection container.

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

Ninject is a lightweight dependency injection framework for .NET applications. It helps you split your application into a collection of loosely-coupled, highly-cohesive pieces, and then glue them back together in a flexible manner. By using Ninject to support your softwares architecture, your code will become easier to write, reuse, test, and modify.

Unity is a Dependency Injection container for .NET

The fastest dependency injection framework

A dependency injection framework based in PicoContainer.

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).

Minimalistic dependency injection framework keeps all of your object setup code in one place.

Simple dependency injection for Rails.

A lightweight dependency injection framework to help wire up objects in Ruby

Provides a super simple API for dependency injection

Enable Guice-like dependency injection and contextual object interactions.

Getters & setters for dependency injection