The DotGNU project has proudly announced its first CD-ROM release. You can now compile and run C# and C applications that use the base class libraries, XML, and System.Windows.Forms under multiple operating systems. Webservice programs can be executed in a webservice server on top of a highly scalable distributed middleware, and they can be integrated with a web-based GroupWare suite.
The CD-ROM includes documentation, full source code, and packages for GNU/Linux, FreeBSD, Mac OS X, and MS Windows. You can get the gzip'ed ISO image (219 MB) as a BitTorrent download, or purchase the CD from CheapBytes.