Qiskit by IBM An open-source SDK for working with quantum computers at the level of pulses, circuits, and application modules.
Cirq by Google An open source framework for programming quantum computers
Q# (Q Sharp) by Microsoft A Microsoft’s open-source programming language for developing and running quantum algorithms
Braket SDK by Amazon An open source library that provides a framework that you can use to interact with quantum computing hardware devices through Amazon Braket.
PennyLane by Xanadu A cross-platform Python library for differentiable programming of quantum computers. Train a quantum computer the same way as a neural network.
PyQuil by Rigetti A Python library for quantum programming using Quil, the quantum instruction language developed at Rigetti Computing