Add CAD capabilities to your .NET application with CadLib. CadLib makes it extremely easy to interface with, draw and print DWG and DXF files in C#, VB.NET or any other .NET language. This is achieved by providing the developer with a powerful, highly normalized class model, complete type safety, comprehensive documentation and sample solutions. CadLib can display DWG and DXF files in WPF, export to XAML, display using GDI+ (Windows Forms), and OpenGL. Furthermore CadLib provides converters to convert DWG and DXF files to all popular image formats as well as Pdf, PostScript and SVG. CadLib can be integrated in ASP.NET web applications.

DIZipWriter is a Delphi component to create PKZip-compatible ZIP archives. Archive output is completely stream-based and works with any TStream descendant. DIZipWriter therefore direclty writes to files (TFileStream), memory (TMemoryStream), or even database BLOBs (TBlobStream). Convenience functions to work files and file based archives are available.

VMProtect protects code by executing it on a virtual machine with non-standard architecture that makes it extremely difficult to analyze and crack the software. Besides that, VMProtect generates and verifies serial numbers, limits free upgrades and much more.

GemBox.Spreadsheet is a .NET component that enables developers to read, write, convert and print spreadsheet files (XLSX, XLS, ODS, CSV, HTML, PDF or XPS) from their .NET applications using one simple API. GemBox.Spreadsheet requires only .NET Framework and is many times faster than Microsoft Excel automation. GemBox.Spreadsheet is a .NET component that enables developers to read, write, convert and print spreadsheet files (XLSX, XLS, ODS, CSV, HTML, PDF, XPS) from .NET applications in a simple and efficient way without requiring Microsoft Excel to be installed on the server.

Components for viewing, navigating, text extracting and editing PDF files.

Features:

Uses PDFium open-source PDF rendering engine
Available for .NET 2 - 4.6
Source code included in full version
Royalty free distribution in applications

Delphi and C++ Builder components for viewing, navigating, text extracting and editing PDF files.

Features:

Uses PDFium open-source PDF rendering engine
Supports Delphi/C++ Builder 5 - 10 and Lazarus 1.4.4
Source code included in full version
Royalty free distribution in applications