Fritzing is described as 'Open-source tool supporting designers in prototyping, documenting circuits, sharing, and creating PCB layouts, empowering artists, researchers, and hobbyists' and is a very popular circuit simulator in the education & reference category. There are more than 50 alternatives to Fritzing for a variety of platforms, including Windows, Mac, Linux, Web-based and Flathub apps. The best Fritzing alternative is KiCad, which is both free and Open Source. Other great apps like Fritzing are Autodesk EAGLE, Square Sketch, LibrePCB and Proteus PCB design.
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.
CircuitMaker is the best free PCB design software by Altium for Open Source Hardware Designers, Hackers, Makers, Students and Hobbyists. From the about page of the website:
iCircuit is the easy to use electronic circuit simulator and designer - the perfect tool for students, hobbyists, and engineers.
TinyCAD is an open source schematic capture program for MS Windows. Use TinyCAD to produce professional circuit diagrams and export net list information to PCB applications.
CRUMB is an immersive interactive 3D Circuit Simulator that can be used as a learning educational tool or a prototype workspace for electronic development.
Printed Circuit Board Design Made Easy: Professional-Grade PCB Design Software with Free Live Technical Support. PCB Artist Includes Features Such as Multi-Page Schematics and Netlist Import.
pcb-rnd is a free/open source, flexible, modular Printed Circuit Board editor for design of professional and hobby boards. It has a strong UNIX mind set.
Circuit Diagram is a free application for making electronic circuit diagrams and exporting them as images. Design circuits online in your browser or using the desktop application.
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it is copleted and integrated