Choco-solver
Choco-solver: A Java library for constraint programming - Published in JOSS (2022)
pyro
pyro: a framework for hydrodynamics explorations and prototyping - Published in JOSS (2019)
madupite
madupite: A High-Performance Distributed Solver for Large-Scale Markov Decision Processes - Published in JOSS (2025)
diffsol: Rust crate for solving differential equations
diffsol: Rust crate for solving differential equations - Published in JOSS (2026)
COSMO
COSMO: Accelerated ADMM-based solver for convex conic optimisation problems (LP, QP, SOCP, SDP, ExpCP, PowCP). Automatic chordal decomposition of sparse semidefinite programs.
sundials
Official development repository for SUNDIALS - a SUite of Nonlinear and DIfferential/ALgebraic equation Solvers. Pull requests are welcome for bug fixes and minor changes.
pyelli
An open source ellipsometry analysis tool for reproducible and comprehensible building of optical models.
HODLRlib
HODLRlib: A Library for Hierarchical Matrices - Published in JOSS (2019)
cppnumericalsolvers
a lightweight header-only C++17 library of numerical optimization methods for (un-)constrained nonlinear functions and expression templates
FdeSolver
FdeSolver.jl: A Julia package for the numerical solution of fractional differential equations (FDEs) as well as systems of equations.
lapsolver
Fast linear assignment problem (LAP) solvers for Python based on c-extensions
https://github.com/conda/conda-libmamba-solver
The libmamba based solver for conda.
https://github.com/conradsnicta/armadillo-code
Armadillo: fast C++ library for linear algebra & scientific computing - https://arma.sourceforge.net
tsppddl
The Traveling Salesman Problem with Pickups, Deliveries and Draft Limits
pyvrp
Open-source, state-of-the-art vehicle routing problem solver in an easy-to-use Python package.
sleipnirgroup-jormungandr
A linearity-exploiting sparse nonlinear constrained optimization problem solver that uses the interior-point method.
MDPSolver
MDPSolver: An Efficient Solver for Markov Decision Processes - Published in JOSS (2025)
tmlqcd
tmLQCD is a freely available software suite providing a set of tools to be used in lattice QCD simulations. This is mainly a HMC implementation (including PHMC and RHMC) for Wilson, Wilson Clover and Wilson twisted mass fermions and inverter for different versions of the Dirac operator. The code is fully parallelised and ships with optimisations for various modern architectures, such as commodity PC clusters and the Blue Gene family.
pymzm
Create pure Minizinc .mzn files from Python using python-minizinc-maker library.