Use OCR.NET component to retrieve text from image, for example from scanned paper document.
uses Tesseract OCR engine and Leptonica image processing library
available for .NET 2 - 4.7
source code included in registered version
royalty free distribution in applications

Delphi and C++ Builder optical barcode recognition library for FireMonkey.

uses ZXing.Net library
supports UPC-A, UPC-E, EAN-8, EAN-13, Code 39, Code 93, Code 128, Codabar, ITF, RSS-14, RSS-Expanded, QR Code, Data Matrix, Aztec and PDF 417 barcodes
supports Windows 32 and Windows 64 FireMonkey applications
available for Delphi/C++ Builder XE2 - 10.2
source code included in registered 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 Windows 32, Windows 64, macOS, iOS32, iOS64 and Android
Available for Delphi/C++ Builder XE2 - 10.2
Source code included in registered version
Royalty free distribution in applications

Delphi and C++ Builder serial communication library for FTDI devices for Android.

uses FTDI D2XX library
no special root access privileges needed
available for Delphi/C++ Builder XE6 - 10.2
source code included in registered version
royalty free distribution in applications

Delphi and C++ Builder communication library for FTDI FT311D and FT312D devices for Android.

Features:

Supports the complete FT311D/FT312D functionality
No special root access privileges needed
Available for Delphi/C++ Builder XE6 - 10.2
Source code included in registered version
Royalty free distribution in applications

PDF4NET is a .NET library for adding PDF capabilities in your .NET applications. Its simple and easy to use object model allows creating complex PDF documents or import existing PDF files with a few lines of code. The library provides support for both standard .NET framework and compact .NET framework. Written entirely in C#, it is a 100% .NET component, not just a COM wrapper. And not to forget, ROYALTY FREE distribution.

Delphi and C++ Builder library for communicating with HID USB devices.
uses HIDAPI library
supports Windows 32, Windows 64, macOS and Linux
available for Delphi/C++ Builder XE2 - 10.3 Rio
source code included in registered version
royalty free distribution in applications

Delphi and C++ Builder component to acquire images from scanner devices.

uses ImageCaptureCore framework
available for Delphi/C++ Builder XE8 - 10.2
source code included in registered version
royalty free distribution in applications

Delphi and C++ Builder components for playing and recording waveform audio.

uses standard Windows Waveform Audio API
supports raw PCM audio data and PCM wav files
supports Delphi/C++ Builder XE7 - 10.2 FireMonkey applications
supports Windows 32/64-bits
source code included in registered version
royalty free distribution in applications

Delphi and C++ Builder component for accessing Windows I/O and memory-mapped ports.

access to I/O and memory-mapped ports on 32 and 64-bit Windows
PnP device drivers built using Microsoft KMDF WDK framework
easy of use, component is fully autoconfigurable
block data transfer enables high speed data transfer
DirectAccess mode provides the fastest access to I/O ports (32-bit Windows only)
available for Delphi/C++ Builder 5 - 10.2 and Lazarus 1.8
source code included in full version
royalty free distribution of component and device driver with applications