Tunshell (Beta) - "Tunshell is a simple and secure method to remote shell into ephemeral environments such as deployment pipelines or serverless functions."
Gitduck - "GitDuck is a video call tool built for developers that enables you to talk, share your code and do pair programming with ease."
Micro::Attributes - "This gem allows you to define "immutable" objects, and your objects will have only getters and no setters. So, if you change some object attribute, you will have a new object instance. That is, you transform the object instead of modifying it."