ip-lookup
IP 地址归属地查询：国家/省份/城市/运营商/ASN/时区/坐标，支持本机公网 IP 与任意 IP。免费无 Key。
quantum-sim
Simulate quantum circuits up to 20 qubits with common gates, built-in presets, QASM input, and output statevector plus measurement probabilities.
