Weland is a Marathon map editor by Gregory Smith, written in C#, and
using GTK#

It is available under the GNU General Public License, see the file
COPYING for details.

To run it, you will need a C# runtime (either .NET 3.5 or Mono 2.0 or
higher), as well as GTK#

Windows
    Make sure you have the .NET runtime installed
    http://msdn.microsoft.com/en-us/netframework/default.aspx

    Install the GTK# for .NET package
    http://www.go-mono.com/mono-downloads/download.html

Mac OS X
    Download the Mono runtime, which includes everything you need:
    http://www.go-mono.com/mono-downloads/download.html

Linux
    Install Mono and gtk-sharp from your distributions package system
