MonoDevelop is a free GNOME integrated development environment (IDE) 
primarily designed for C# and other .NET languages. 

It was originally a port of SharpDevelop 0.98.

The main features of MonoDevelop are:

	* Code Completion
	* Class Management
	* Built-in Help
	* Project Support
	* Add-ins

WWW: http://monodevelop.com/