Norbert Bollow writes "DotGNU, the GNU project's Free Software alternative to .NET, has come a long way in the last 2.5 years, and it is now possible to use DotGNU to implement application programs and web services in C#, running them in the DGEE webservice server, and integrating them with the phpGroupWare web-based GroupWare suite.

DotGNU addresses the risk of monopolistic .NET platform vendor lock-in, since now you can compile and run C# and C applications that use the base class libraries, XML, and System.Windows.Forms under multiple operating systems, such as GNU/Linux, FreeBSD, Mac OS X, MS Windows, and more!
http://www.newsforge.com/article.pl?.../11/04/1421251