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.

Alki (AL-kai) is a Dependency Injection framework for Ruby. Helps organize and scale your project, so you can focus on the important stuff.

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

A gem to handle dependency injection on ruby applications

Dependency injection container compatible with the SOAR Ruby framework

Racket Registry is an easy-to-use container lib for most of your dependency injection container needs.