Ruby Installer For Windows at sourceforge

Now you can get Ruby Installer For Windows from http://rubyinstaller.sourceforge.net/.

Excerpted from the site.

This is a "one-click", self-contained installer that
comprises the Ruby language itself, dozens of popular
extensions and packages, a syntax-highlighting editor
and execution environment, and a Windows help file that
contains the full text of the book, "Programming Ruby:
The Pragmatic Programmer's Guide". 

It’s a must item for Ruby users on Win32 box. Check also eban/ruby/binaries/”>eban’s win32 binaries to get Win32 binaries with dozens of popular extensions.