qrcodegen-cpp is a QR code generator library in C++. The project also offers Java, Javascript, Python, C, and Rust implementations.

libdmtx is software for reading and writing Data Matrix 2D barcodes of the modern ECC200 variety. libdmtx is a shared library, allowing C/C++ programs to use its capabilities without restrictions or overhead.

Zbarlight is a simple wrapper for the zbar library. It can read all zbar supported codes.

Libqrencode is a C library for encoding data in a QR Code symbol, a kind of 2D symbology that can be scanned by handy terminals such as a mobile phone with CCD. The capacity of QR Code is up to 7000 digits or 4000 characters, and is highly robust.

ZBar can read barcodes from various sources, such as video streams, image files, and raw intensity sensors. It supports EAN-13/UPC-A, UPC-E, EAN-8, Code 128, Code 93, Code 39, Codabar, Interleaved 2 of 5, QR Code and SQ Code. Included with the library are basic applications for decoding captured bar code images and using a video device (e.g. webcam) as a bar code scanner. For application developers, language bindings are included for C, C++ and Python as well as GUI widgets for GTK and Qt.

GNU Barcode is a flexible tool to produce printed barcodes from text strings. It supports a variety of encoding standards and sizing measurements. Barcodes can be output in PostScript or Encapsulated PostScript formats.

ZXing-CPP is a barcode scanning library.

Read one-dimensional barcodes and QR codes using the zbar library.

Features:

• Pure python

• Works with PIL / Pillow images, OpenCV / numpy ndarrays, and raw bytes

• Decodes locations of barcodes

• No dependencies, other than the zbar library itself

Zint is a suite of programs to allow easy encoding of data in any of the wide range of public domain barcode standards and to allow integration of this capability into your own programs.

ZXing-CPP is a barcode scanning library.

ZBar can read barcodes from various sources, such as video streams, image files, and raw intensity sensors. It supports EAN-13/UPC-A, UPC-E, EAN-8, Code 128, Code 93, Code 39, Codabar, Interleaved 2 of 5, QR Code and SQ Code. Included with the library are basic applications for decoding captured bar code images and using a video device (e.g. webcam) as a bar code scanner. For application developers, language bindings are included for C, C++ and Python as well as GUI widgets for GTK and Qt.

fpylll is a Python wrapper for fplll.

xtensor is a C++ library meant for numerical analysis with multi-dimensional array expressions.

xtensor provides:

• an extensible expression system enabling lazy broadcasting.

• an API following the idioms of the C++ standard library.

• tools to manipulate array expressions and build upon xtensor.

Python-flint is a Python extension module wrapping FLINT (Fast Library for Number Theory) and Arb (arbitrary-precision ball arithmetic). It supports integers, rationals, modular integers, real and complex ball arithmetic, polynomials and matrices over all these types and other mathematical functions.

SymEngine is a standalone fast C++ symbolic manipulation library. Optional thin wrappers allow usage of the library from other languages.

FFTW is a C subroutine library for computing the discrete Fourier transform (DFT) in one or more dimensions, of arbitrary input size, and of both real and complex data (as well as of even/odd data---i.e. the discrete cosine/ sine transforms or DCT/DST). This CMake build offers the file FFTW3LibraryDepends.cmake required by some dependent packages, absent in the gnu build version.

PariTwine is a glue library between the system for computer algebra and number theory PARI/GP and a number of other mathematics libraries, currently GMP, GNU MPFR, GNU MPC, FLINT and CMH.

LinBox is a C++ template library for exact linear algebra computation with dense, sparse, and structured matrices over the integers and over finite fields.

NTL is a C++ library providing data structures and algorithms for manipulating signed, arbitrary length integers, and for vectors, matrices, and polynomials over the integers and over finite fields.

IML is a C library implementing algorithms for computing exact solutions to dense systems of linear equations over the integers. Currently, IML provides the following functionality:

• Nonsingular rational system solving: compute the unique rational solution X to the system AX=B, where A and B are integer matrices, A nonsingular.

• Compute the right nullspace or kernel of an integer matrix.

• Certified linear system solving: compute a minimal denominator solution x to a system Ax=b, where b is an integer vector and A is an integer matrix with arbitrary shape and rank profile.

In addition, IML provides some low level routines for a variety of mod p matrix operations: computing the row-echelon form, determinant, rank profile, and inverse of a mod p matrix. These mod p routines are not general purpose; they require that p satisfy some preconditions based on the dimension of the input matrix (usually p should be prime and should be no more than about 20 bits long).

Eigen is a C++ template library for linear algebra: matrices, vectors, numerical solvers, and related algorithms. It provides an elegant API based on "expression templates". It is versatile: it supports all matrix sizes, all standard numeric types, various matrix decompositions and geometry features, and more.

GMP-ECM factors integers using the elliptic curve method (ECM) as well as the P-1 and P+1 algorithms. It provides a library and a stand-alone binary.

lmfit is a C library for Levenberg-Marquardt least-squares minimization and curve fitting. It is mature code, based on decades-old algorithms from the FORTRAN library MINPACK.

FFTW is a C subroutine library for computing the discrete Fourier transform (DFT) in one or more dimensions, of arbitrary input size, and of both real and complex data (as well as of even/odd data---i.e. the discrete cosine/ sine transforms or DCT/DST). Single-precision version.