Quantum4J brings quantum programming to Java with a full Quantum Software Engineering stack — circuits, simulators, compiler passes, QASM support, and enterprise-grade extensibility.

QENS provides a layered API for researchers, educators, and engineers working with quantum error correction. It ships with built-in support for surface codes, repetition codes, and color codes, multiple decoder implementations, and publication-quality visualization -- all with only numpy and matplotlib as dependencies.

A modular quantum computing library in Python featuring QAOA, Grover, HHL, and VQC — built on Qiskit, with future plans to become a QPU-agnostic, from-scratch quantum SDK.

Flagship SDK for the QONTOS hybrid superconducting-photonic platform.

AbirQu multi-language quantum SDK - AbirQu is built to deliver high-performance hybrid quantum-classical execution (CPU/GPU/cloud quantum backends), with ongoing benchmark validation against established SDKs.

QuEra Computing is a Boston-area neutral-atom quantum computing company, founded in 2021 by scientists from Harvard and MIT. Its flagship system, Aquila, is a 256-qubit field-programmable analog neutral-atom quantum processor that has been publicly available since November 2022 through Amazon Braket and through a direct Premium Access channel.…