The gEDA project has produced and continues working on a full GPL'd suite and toolkit of Electronic Design Automation tools. These tools are used for electrical circuit design, schematic capture, simulation, prototyping, and production.




ModelSim is described as '-Altera Software' and is an app. There are eight alternatives to ModelSim for Windows, Linux, Web-based and Mac. The best ModelSim alternative is gEDA Project, which is both free and Open Source. Other great apps like ModelSim are CircuitLab, Experimenters Circuits, Circuit Tree and Cadence Incisive.
The gEDA project has produced and continues working on a full GPL'd suite and toolkit of Electronic Design Automation tools. These tools are used for electrical circuit design, schematic capture, simulation, prototyping, and production.




Sketch, simulate, and share your circuits, entirely in your browser -- no install required. Easy schematic capture and powerful SPICE-like, mixed-mode circuit simulation helps EE students, electronics hobbyists, and electrical engineers design faster.




Educational virtual 3D laboratory simulator helps students, teachers, and tutors conduct electrical circuit experiments by providing realistic equipment access anywhere, avoiding availability issues and safety hazards, and enhancing learning with immediate feedback and...







System Verilog, Verilog, VHDL, SystemC HDL Simulator for ASIC Design and Verification
Spice based electronic circuit simulation and circuit analysis software. 5Spice has the analysis capabilities needed by experienced circuit designers while remaining easy to use.

Provides products and services that accelerate innovation in the global electronics market.
System Verilog, Verilog. VHDL, SystemC, HDL simulator targeting ASIC and large FPGA designs. (Wrongfully supports crappy OVM and UVM legacy trash libraries and hardware de-accelerators).