There are 3 repositories under datamatrix topic.
Code scanner library for Android, based on ZXing
Qt/QML wrapper library for the ZXing library. 1D/2D barcode image processing library
Barcode Writer in Pure PostScript
PHP library to generate linear and bidimensional barcodes
barcode.php - Generate barcodes from a single PHP file. MIT license.
cRustacean Crossing
:label: Python label/sticker PDF generation. HTML templates, built-in barcodes, qr codes, and other goodies
Lightweight Barcode Encoding Library for .NET Framework, .NET Standard and .NET Core.
A QR code image generator and detector for React Native.
Data Matrix generator is for fast creation of rectangular or square 2D codes. Written on vanilla javascript with no dependencies.
A simple React Component using the client's webcam to read barcodes.
Build barcode QR detection apps for Windows, Linux, macOS, Android, iOS and web.
Samples for Dynamsoft Barcode Reader SDK Python Edition
C++ 1D and 2D Barcode Library
C++ 1D/2D barcode reader for Windows, Linux, macOS and Raspberry Pi OS
Pure-python package to generate data matrix codes.
WASM bindings for common rxing functions
Node.js 1D/2D barcode detection SDK built with Dynamsoft Barcode Reader.
Windows .NET Barcode Reader/Scanner Developed with Dynamsoft Barcode Reader
Barcode Function Library Add-In for Excel
JavaScript Barcode/QRCode Reader and Scanner
.NET barcode SDK for Windows, Linux, macOS, Android and iOS
Samples for Dynamsoft Barcode Reader Javascript edition
Dynamsoft Capture Vision React-Native SDK Samples
Ada Bar Codes: bar code (1D and 2D) generator in pure Ada
Library that enables programs to write Data Matrix barcodes of the modern ECC200 variety.
A command line interface for rxing
Samples for Dynamsoft Barcode Reader Android and iOS edition
Office Barcode Integration for Excel
I wondered how Reed Solomon works. The end result is a working Qr code scanner. That escalated quickly.