Qucs, briefly for Quite Universal Circuit Simulator, is an integrated circuit simulator which means you are able to setup a circuit with a graphical user interface (GUI) and simulate the large-signal, small-signal and noise behaviour of the circuit.
Circuit Simulator Status Details
Circuit Simulator Alternatives
SaaSHub's Down Detector checks the status of services automatically and regularly. However, we cannot promise 100% accuracy. That is why we depend on user reported issues as well. The Circuit Simulator status here can help you determine if there is a global outage and Circuit Simulator is down for everyone or it is just you that is experiencing problems. Please always report any issues to help others know the current status.