Versionable lets a ruby module or class declare multiple numbered versions of itself, and provides a way to select one based on a gem-like requirement.

Versionary has a simple VersionNumber object that allows you to do things like `raise "Not the right version" unless VersionNumber.of( RUBY_VERSION ) >= '1.9.2'`

Appends versions to your Gemfile's gem listings

Makes creating flexible version bombs dead simple.

Parse, compare, and increment RubyGem versions with the 'gem-version' CLI command or the 'VersionBoss::Gem::Version' class.

a version bot to help yiyetech dev team to set release version

Gem for testing bundler dependency management

Version ActiveRecord models using composite primary keys

`versioned-routes-rails` adds a single method to the Rails `routes.rb` DSL,`version`, which allows you to specify API versions.

Manage your seed scripts by versioning them

Rails 3 / AbstractController gem for versioned views

Versionian is a Ruby library for declaring, parsing, comparing, and rendering version schemes. It provides model-driven primitives for defining how versions work, supporting Semantic Versioning, Calendar Versioning, and unlimited custom schemes through YAML configuration or Ruby inheritance.

Easy way to get version label, bump the segments (major, minor, patch), and you can include custom version data

Versioning for AR objects

Pull Github "Release" data into your app - forming a central way to define "versions"

Increment your project's version and history file automatically

Versioning lib (with Git support)

A generic version parsing library.

Easily read your VERSION file and display it in different formats

Allows versioning of active model serializers