BOOLR
Logicly
Circuit Simulator
Virtual Breadboard
Logisim
OpenModelica
PartSim
Digital
Multisim
LTspice
QUCS
EasyEDA
Proteus PCB design
KiCad
Pspice
Altium Designer
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Logicly - - Design circuits quickly and easily with a modern and intuitive user interface with drag-and-drop...
LTspice - LTspiceยฎ is a high performance SPICE simulation software, schematic capture and waveform viewer with enhancements and models for easing the simulation of analog circuits.
Circuit Simulator - Animated electronic circuit simulator using ideal components to visualize voltage and current.
QUCS - 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.
Virtual Breadboard - It is a circuit simulator on a virtual breadboard.
EasyEDA - EasyEDA - Web-based EDA suite; runs in browser.