The TatukGIS Developer Kernel (DK) is a powerful GIS component (SDK) for custom developing stand-alone, client-server, web server, embedded, and mobile applications. It is ideal for adding GIS functionality to already existing products, porting software applications from less attractive GIS platforms, and developing new applications from scratch. DK product editions are available for multiple development platforms:

Microsoft .NET for WinForms and WPF
Microsoft ActiveX/OCX
Microsoft ASP.NET (for web solutions)
Microsoft .NET Compact Framework (for mobile solutions)
Embarcadero Delphi/C++Builder VCL

DLL libary for serial communication for Windows.

communication with any device connected to serial port
easy of use and very powerful
uses multithreading and overlapping for maximum performance
source code included in full version
royalty free distribution with applications

Delphi library for processing Excel .xlsx documents.

create or modify Excel Workbook .xlsx files
Microsoft Office installation is not required
uses Microsoft Open XML SDK 2.5 and ClosedXML libraries
requires Microsoft .NET 4 Framework or higher
available for Delphi 7 - 10.1
royalty free distribution in applications

Delphi and C++ Builder components for automating Microsoft Office.

supports Microsoft Office 97 - 2013
contains Excel and Word components
available for Delphi/C++ Builder 5 - 10.1 and Lazarus 1.6
source code included in full version
distributing components in applications is royalty free

Delphi and C++ Builder communication components. Protocols 3964 and 3964R are implemented.

Features:

Available for Delphi/C++ Builder XE2 - 10.1
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
available for Delphi/C++ Builder 5 - 10.1 and Lazarus 1.6.2
source code included in registered version
royalty free distribution in applications