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

A micro-optimized, high-performance NISQ Statevector Quantum Simulator using JAX XLA Kernel Fusion.

Schrödinger-like simulator of quantum computers

Neutral cross-backend benchmarking for quantum circuit simulators. Found a silent Rz convention bug that breaks QAOA fidelity to zero.

Statevector QC Simulator built in Rust

GPU-accelerated quantum circuit simulator with REST API. "Local", zero cloud-vendor lock-in.

Zeno — Apple Silicon-native quantum circuit simulator, compiler & runner. Slice time finely enough and the arrow never moves.

QLEMU is a virtual representation of quantum computers, providing a basic software implementation of qubits, quantum gates, and logic for testing qantum algorithms.