TL:DR; 100% managed version of ZLIB compression library.
100% managed version of ZLIB compression library. Full C# source code is included.
SmartCodeDeveloper is a robust Windows Form Control that allows you to easily add professional bar codes to .Net applications. The control will work with SQL Server Reporting Services, Crystal Reports, Web Services, Databinding, WPF and XBAP.
The Iron OCR library https://ironsoftware.com/csharp/ocr for C# developers provides advanced image to text functionality for microsoft.net web applications, desktop applications and enterprise services. Alternative to Tesseract 3, 4, 5 for C# VB .NET
.NET component that sends and receives faxes using a fax modem. It has been developed in c-sharp and source code can be purchased.