Delphi and C++ Builder library for creating and processing PDF documents.

uses PDFsharp library
supports Windows 32 and Windows 64
available for Delphi/C++ Builder 7 - 10.4
royalty free distribution in applications

Delphi library for interoperability with Java using Java Native Interface (JNI) and .class files.

Uses standard Java Native Interface
Available for Delphi 5 - 11 and Lazarus 2.0.12
Supports Windows 32, Windows 64, macOS and Linux
Source code included in registered version
Royalty free distribution with applications

Delphi and C++ Builder jаvascript Object Notation (JSON) library.

Read and modify JSON files
Create new JSON files
Full JSON supported: literals, numbers, strings, arrays and objects
Date/time encoding and decoding supported
Customizable output
Provides in-memory and streaming JSON parsers and generators
Supports Windows, macOS, iOS and Android
Available for Delphi/C++ Builder 5 - 11 and Lazarus 2.0.12
Source code included in registered version
Royalty free distribution in applications

jаvascript engine for Delphi and C++ Builder.

uses Microsoft ChakraCore jаvascript engine
supports Windows 32 and Windows 64
available for Delphi/C++ Builder 6 - 11 and Lazarus 2.0.12
source code included in registered version
distributing library in applications is royalty free

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

Uses HIDAPI library
Supports Windows 32/64, macOS and Linux
Available for Delphi/C++ XE2 - 11
Source code included in registered version
Royalty free distribution in applications

Delphi and C++ Builder optical character recognition component.

Uses Tesseract OCR engine and Leptonica image library
Supports Delphi/C++ Builder 5 - 11 and Lazarus 2.0.12
Source code included in registered version
Royalty free distribution in applications

Delphi and C++ Builder optical barcode recognition component.

uses ZBar bar code reader library
supports EAN-13/UPC-A, EAN-8, UPC-E, Code 39, Code 93, Code 128, Codabar, PDF417, GS1 DataBar, GS1 DataBar Expanded, Interleaved 2 of 5, SQ Code and QR Code barcodes
supports Windows 32 and Windows 64
available for Delphi/C++ Builder 5 - 11 and Lazarus 2.0.12
source code included in registered version
royalty free distribution in applications

TransLT SDK is offered free of charge for software developers wishing to create applications that take advantage of the coordinates transformations capabilities of TransLT.

Java Database Connectivity (JDBC) library for Android.

JDBC drivers for H2, Microsoft SQL, Sybase SQL and PostgreSQL databases
Available for Delphi/C++ Builder 10 - 11
Source code included in registered version
Royalty free distribution in applications

Skia is a great open source library for drawing 2D Text, Geometries, Images, focused on accurate, high quality and high performance rendering, which provides common APIs that work across a variety of hardware and software platforms.