In order to offer you, as a Pascal developer, the opportunity to work with the OPC standard in the familiar Embarcadero (Codegear, Borland) Delphi and Lazarus environment, we've developed a OPC software toolkit (SDK, Framework, Toolbox) supporting the most common interfaces and protocols of OPC (Data Access DA, XML DA, Alarms & Events AE and Historical Data Access HDA).

Delphi and C++ Builder library for communicating with HID USB devices.

uses HIDAPI library
supports Windows 32 and Windows 64
available for Delphi/C++ Builder 5 - 10.2 and Lazarus 1.6.4
source code included in registered version
royalty free distribution in applications

Delphi and C++ Builder components you can use to add messaging functionality into your applications.

uses standard Windows SimpleMAPI API
compatible with MS Outlook, Outlook Express, Mozilla Thunderbird and other email clients
available for Delphi/C++ Builder 5 - 10.2 and Lazarus 1.6.4
source code included in registered version
distributing components in applications is royalty free

Delphi and C++ Builder components to enable applications interact with FTP, and HTTP/HTTPS protocols to access Internet resources.

FTP, HTTP and HTTPS protocols supported
well suited for accessing REST services
uses standard Windows WinINet API
available for Delphi/C++ Builder 5 - 10.2 and Lazarus 1.6.4
source code included in registered version
royalty free distribution

THaruPDF uses a modified version of libharu that was compiled with Embarcadero BCC32C C++ Compiler. Modified libharu include multiple patches made by community and its latest build can be found in this repository in bin\libhpdf.dll.

Delphi and C++ Builder data compression library.

uses Brotli library
supports Windows 32 and Windows 64
available for Delphi/C++ Builder 6 - 10.2 and Lazarus 1.6.4
source code included in registered version
royalty free distribution in applications

Delphi and C++ Builder component for serial communication for Windows.

communication with devices connected to serial port
easy of use and very powerful
uses multithreading and overlapping for maximum performance
available for Delphi/C++ Builder 5 - 10.2 and Lazarus 1.6.4
source code included in registered version
royalty free distribution in applications

Delphi and C++ Builder camera component for Windows.

uses DirectShow 9 API
available for Delphi/C++ Builder 7 - 10.2 and Lazarus 1.6.4
royalty free distribution in applications

Delphi and C++ Builder communication components. Protocols 3964 and 3964R are implemented.
available for Delphi/C++ Builder 5 - 10.2 and Lazarus 1.6.4
royalty free distribution

Delphi and C++ Builder barcode component.

uses Zint Barcode Generator
supports over 50 symbologies including Code 128, Data Matrix, USPS OneCode, EAN-128, UPC/EAN, ITF, QR Code, Code 16k, PDF417, MicroPDF417, LOGMARS, Maxicode, GS1 DataBar, Aztec, Composite Symbols and more
available for Delphi/C++ Builder 5 - 10.2 and Lazarus 1.6.4
royalty free distribution in applications