Try OpenSolaris

There are three ways to try the OpenSolaris Operating System:

1. Request a Free CD. Access the Free CD request form by logging in or registering for an account. The CD will be shipped at no cost and may be shared with others.
2. Try the OpenSolaris On Demand Learning Service. Test the new features of OpenSolaris without downloading, installing, or configuring. Log in to the portal using your My Sun Connection account (registration is free). Then work with the new features in the latest release for one hour for free.
3. Download Now. Download the OpenSolaris 2009.06 CD installer (approximately 670Mb) or torrent (license terms). Additional information for new users can be found here.