Pspice is described as 'Software for Simulating Voltage and Currents of a text file net-list of a electronics components such as Resistors, Capacitors, inductors, transisters, Diodes, Voltage and Current Sources, etc' and is an app in the Education & Reference category. There are more than 25 alternatives to Pspice for a variety of platforms, including Windows, Mac, Linux, Online / Web-based and iPhone. The best alternative is Circuit Simulator, which is both free and Open Source. Other great apps like Pspice are LTspice (Free), QUCS (Free, Open Source), Ktechlab (Free, Open Source) and OrCAD (All Products) (Paid).
Circuit Simulator vs Pspice opinions
Most users think Circuit Simulator is a great alternative to Pspice.
The Quite Universal Circuit Simulator (QUCS) is an integrated circuit simulator allowing the simulation and graphical presentation of results of large-signal, small-signal and noise behavior in circuits.
KTechLab is an IDE for microcontrollers and electronics. It supports circuit simulation, program development for microcontrollers and simulating the programmed microcontroller together with its application circuit.
This electronic circuit simulator is highly interactive giving the feeling of playing with real components. It's very helpful for experimentation and visualization. It's a desktop version of the Circuit Simulator.
Ngspice is a mixed-level/mixed-signal circuit simulator. Its code is based on three open source software packages: Spice3f5, Cider1b1 and Xspice. Ngspice is part of gEDA project, a full GPL'd suite of Electronic Design Automation tools.
Some users think Ngspice is a great alternative to Pspice, some don't.