RubyInstaller for Windows
The RubyInstaller Development Kit (DevKit) is a MSYS/MinGW based toolkit than enables you to build many of the native C/C++ extensions available for Ruby. Each version of RubyInstaller requires a particular DevKit version. Please make sure you download the correct version of the DevKit for your RubyInstaller installation.
Ruby Installers for Windows. Please see the release notes of each release for the included changes and MD5 checksums.