Browse free open source Quantum Computing software and projects for Windows below. Use the toggles on the left to filter open source Quantum Computing software by OS, license, language, programming language, and project status.
The fundamental package for scientific computing with Python
QuTiP: Quantum Toolbox in Python
Accelerated libraries for quantum-classical computing built on CUDA-Q
C++ and Python support for the CUDA Quantum programming model
Qiskit is an open-source SDK for working with quantum computers
A python framework for creating, editing, and invoking NISQ
A decomposing solver
Variational Quantum Circuit Simulator for Quantum Computation Research
Quantum Computer Library for Everyone
Berkeley Quantum Synthesis Toolkit
The electronic structure package for quantum computers
Extensible, Efficient Quantum Algorithm Design for Humans
A Python library for quantum programming using Quil
Azure Quantum Development Kit
An open source framework for programming photonic quantum computers
Quantum software platform that is optimized across the quantum stack
Mitiq is an open source toolkit for implementing error mitigation
A PyTorch-based framework for Quantum Classical Simulation
QPanda 2 is an open source quantum computing framework
Paddle Quantum
An open source software framework for quantum computing
NOTICE OF CONSOLIDATION & PARTNERSHIP PENDING As of April 2026, the 20
NOTICE OF CONSOLIDATION & PARTNERSHIP PENDING As of April 2026, the 20
NOTICE OF CONSOLIDATION & PARTNERSHIP PENDING As of April 2026, the 20
PHASH | post-quantum XOF hashing algorithm | C++20