Pspice Student Version ((link)) 🏆 🆕

PSpice Student Version isn't perfect. The user interface looks like it was designed in 2003, and it crashes if you click too fast. But for $0.00, it gives you access to the same simulation engine that designs fighter jets and medical devices.

From Classroom to Real World: Why PSpice Student Version is Still the Best Free Tool for Circuit Simulation pspice student version

You cannot simulate an entire ARM processor or a full switching power supply with 500 components. But for homework, class projects, and senior design sub-circuits (filters, amplifiers, oscillators), it is perfect. Pro Tips for Beginners (Avoid my mistakes) 1. Ground Everything PSpice is ruthless. If you forget to place a ground (0V reference) on your schematic, the simulation will throw a "Floating Node" error and refuse to run. Every circuit needs at least one ground. PSpice Student Version isn't perfect