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DSpice: Design and Simulation of Circuits using Spice
...Custom Modeling: Creating new SPICE models for various electrical components.
. Symbol Design: Designing and managing custom schematic symbols for these models.
. Schematic Capture: Drawing and designing circuits using an intuitive CAD-style schematic editor.
. Circuit Simulation: Executing simulations (OP/Tran) seamlessly using ngspice.
. Waveform Visualization: Analyzing and presenting simulation results through a dedicated waveform viewer and Prob.
. Licensed under: DSPICE is free to use "MIT";
. Open source;