USPS One Code - Intelligent Mail Barcode (4-State Customer Barcode) - encoder implementation with VS 2008. Source code in C# and VB.NET and binaries for .NET (1.1, 2.0 and 3.5), .NET CF (2.0 and 3.5) and Mono (1.* and 2.0).
Easy to implement. I had never worked with the intelligent mail barcode before and this helped a lot!
It's good~ but Now I'm using this http://www.onbarcode.com/products/net_barcode/barcodes/onecode.html generating Onecode in C#, ASP.NET, WinForms, Reporting Service and so on~ It's pretty good and easy to use~ really helped me a lot~