Open Source Programing Utility : SharpDevelop

#develop (short for SharpDevelop) is a free IDE for C#, VB.NET and Boo projects on Microsoft's .NET platform. It is open-source, and you can download both sourcecode and executables from this site. In addition, you can find the latest information and changes on #develop, as well as get in touch with the team in the forum.

Supported Programming Languages

• C# (Code Completion, Windows Forms Designer)
• VB.NET (Code Completion, Windows Forms Designer)
• Boo (Code Completion, Windows Forms Designer)
• IronPython (Code Conversion, Windows Forms Designer, partial Code Completion)
• IronRuby (Code Conversion, Windows Forms Designer)
• F#

Developer Productivity

• Refactoring
• Parallel build support for multi-core machines
• Multi-framework targetting (.NET 2.0, 3.0 and 3.5)
• Code Autoinsert
• Starts from a USB memory stick 
• Read-only project support
  
• Full MSBuild 3.5 support

Quality Tools

• Integrated Debugger
• Code Analysis (FxCop)
• Unit Testing
• Code Coverage
• Profiler
• Integrated Subversion support
• StyleCop addin

And More...

• Setup projects (WiX, More information)
• SharpDevelop Reports .NET open-source reporting solution (More)
• Parser-based code converter (Online Code Converter)
• XML "code completion"
• Documentation generation (Sandcastle, SHFB)
• Reflector addin 
• Easy addin extensibility mechanism
• SharpDevelop for Applications (SDA) allows you to host SharpDevelop in your applications 
• Text editor is rehostable to add a programmer's editor to your applications (including code completion!)

In the Source Code Download

• VC++ project support
• Mono support
• Snippet Compiler
• More Reuse and Extensibility examples 

Learn more about  SharpDevelop.