There are dozens of open-source and free online circuit simulators which can be easily found, therefore many of them are not listed here.
- 5Spice Analysis
An easy-to-use analog circuit simulator for professional circuit designers. This engineering design tool provides Spice-specific schematic entry, as well as the ability to define and save an unlimited number of
analyses and integrated graphic of simulation results. The focus is on analog circuit analysis and design at the component level.
- AmpCalc
A program which calculates power cable ampacity ratings and/or cable operating temperatures for user defined cable installations. AmpCalc is suitable for cable installations utilized in industrial, commercial and utility electrical power distribution systems.
- BSch3V
An open source circuit design software for Windows. The name "BSch" is an abbreviation of "Basic Schematic". It has only basic functions, in order to simplify operation.
- CableBuilder 3D
A software that leverages the power of Autodesk Inventor to deliver a fully integrated 3D CAD tool within the CableBuilder environment. Designs produced in CableBuilder can generate professional, photo-realistic images to be used in reports, datasheets, quotations or catalogues.
- CEDAR Logic Simulator
An interactive digital logic simulator to be used for teaching of logic design or testing simple digital designs. It features both low-level logic gates as well as high-level components, including registers and a Z80 microprocessor emulator.
- CircuitLab
An online schematic editor and circuit simulator that helps electrical engineers save time designing and documenting their projects by providing professional-grade schematics, wiring diagrams and precise simulations.
- Circuit Wizard
An electronic design software that combines circuit design, PCB design, simulation, CAD/CAM manufacture in one complete package.
- DesignSpark Electrical
A powerful and comprehensive range of professional CAD capabilities for electrical circuits, allowing to quickly complete designs and building accuracy and precision into the end-to-end design process.
- E3.series
Zuken's E.3 series is electrical, fluid and wire harness design software, including design of wire harnesses and cable assemblies, electrical schematics and systems, fluid design for hydraulic and pneumatic systems, etc.
- Elecdes Design Suite
Elecdes Design Suite (EDS) is a feature rich set of electrical and instrumentation, design and CAD tools, which consists of several modules:
- Elecdes, 2D electrical CAD design module used for the production of intelligent circuit diagrams including electrical schematic diagrams, wiring diagrams, 1-line diagrams, cable block diagrams and loop diagrams.
- Paneldes Panel, 3D CAD design module used for the creation of electrical panels, which facilitates and enhances construction of electrical models and electrical panel general arrangements, performs wire routing, filling, and wire length calculations.
- Paneldes Raceway, 3D CAD design module used for creation of plant raceway models, which performs cable routing, cable filling and cable length calculations.
- iCircuit
A real-time electronic circuit simulator and designer, versatile enough to be suited to students, hobbyists, and professional electrical engineers.
- KiCad EDA
A Cross Platform and Open Source Electronics Design Automation Suite.
- Logisim
An educational tool for designing and simulating digital logic circuits. With the capacity to build larger circuits from smaller subcircuits, and to draw bundles of wires with a single mouse drag, Logisim can be used to design and simulate entire CPUs for educational purposes.
- LTpowerPlay
A powerful, Windows-based development environment supporting Analog Devices' Digital Power System Management (PSM) products. It supports a variety of tasks: evaluation of Analog Devices' ICs by connecting to a demo board system; building a multi-chip configuration file in an offline mode that can be saved and reloaded at a later time; diagnostic and debugging, being a valuable diagnostic tool during board bringing-up to program, or tweaking the power management scheme in a system, or diagnosing power issues when bringing up rails.
- LTspice
A high-performance SPICE simulation software, schematic capture and waveform viewer with enhancements and models for easing the simulation of analog circuits. Included in the download of LTspice are macromodels for a majority of Analog Devices switching regulators, amplifiers, as well as a library of devices for general circuit simulation.
- MultiSim
An industry-standard SPICE simulation and circuit design software from National Instruments for analog, digital, and power electronics in education and research.
- Ngspice
An open source spice simulator, offering a wealth of device models for active, passive, analog, and digital elements. Model parameters are provided by the semiconductor manufacturers. The user adds circuits as a netlist, and the output is one or more graphs of currents, voltages and other electrical quantities or is saved in a data file.
- PCSCHEMATIC platform
A set of tools that includes: PCSCHEMATIC Automation, an electrical CAD software for drawing schematics for electrical wiring diagrams, control circuit diagrams, pneumatics, and hydraulics; PCSCHEMATIC Cablemanager that keeps track of all relevant data for cables, raceways, cable glands and transits in construction projects, and keeps track of where the cables are pulled.
- PowerSim
A simulation software developed for power electronics circuits, motor control and other requirements like dynamic system simulation.
- PSPICE
An industry-leading, native analog, mixed-signal, and analysis software to deliver a complete circuit simulation and verification solution, providing high-performance circuit simulation to analyze and refine circuits, components, and parameters before committing to layout and fabrication.
- SiMetrix
Fast analog and switching power electronics simulators, providing professional level support, reliable convergence and a fully featured development environment.
- TINA
Circuit Simulator for Analog, Digital & Mixed Circuits and PCB Design.
- TinyCAD
An open-source program for drawing electrical circuit diagrams, or schematic drawings, that supports standard and custom symbol libraries.
- WEBENCH® Power Designer
Software for creation of customized power supply circuits based on user’s requirements. The environment provides end-to-end power supply design capabilities that save time during all phases of the design process.
- XCircuit
A program for drawing publishable-quality electrical circuit schematic diagrams and related figures and producing circuit netlists through schematic capture including writing both hierarchical PostScript outputs and hierarchical SPICE netlists.