Fujitsu NetCOBOL for .NET smoothly integrates with other languages such as Visual Basic, C#, and Eiffel. Fujitsu Software is the only COBOL vendor to deliver support for Microsoft .NET and ASP.NET, including Web Services. It's basically another flavor to the already incredible .NET development tools. http://software.fsw.fujitsu.com/DownloadPlus/Download.html You have to register though, which is super quick. Also, it's a non-Microsoft project. Hope it can actually install.