Note that this information is no longer valid: Ogre no longer uses SVN!
Currently there is no precompiled SDK available to download. You will have to download the latest development version from the Ogre Subversion repository.
Instructions can be found here: http://www.ogre3d.org/developers/subversion
The short version is:
svn co https://svn.ogre3d.org/svnroot/ogre/trunk ogre
or set your Subversion client of choice to use the repository at
If you get any errors about â€˜Hostname mismatchâ€™, this is because svn.ogre3d.org is an alias to the real server name, just ask Subversion to accept the certificate.