Digital
Logisim
BOOLR
Logicly
CircuitVerse.org
Wired Logic
LTspice
Circuit Simulator
Circuit Tree
CircuitLab
Logisim
Synopsys VCS
Riviera-PRO
LTspice
BOOLR
Atanua
Circuit Tree is an automation engine that autonomously designs a circuit board design with given user inputs. Using Components define as proprietary models in its database it creates schematic, component placement and routing on the fly. This means that the automation engine auto selects various types of components for a circuit and knows where to place and route these components on board.
Circuit Tree design engine has been designed by engineers who have experience of more than 20 years designing all types of first time right designs.
Digital Circuit TreeLogisim - Logisim is an educational tool for designing and simulating digital logic circuits.
CircuitLab - Sketch, simulate, and share your circuits, entirely in your browser -- no install required.
BOOLR - Open-source digital logic simulator
Logicly - - Design circuits quickly and easily with a modern and intuitive user interface with drag-and-drop...
Synopsys VCS - HDL Simulator of System Verilog, Verilog, and VHDL for ASIC design and verification.
CircuitVerse.org - CircuitVerse is an online community driven platform to design and simulate digital logic circuits.