Altium Designer is described as 'Unified environment enables schematic capture, PCB layout, mixed-signal simulation, signal integrity analysis, real-time 3D editing, and ECAD-MCAD collaboration' and is a CAD software in the education & reference category. There are more than 50 alternatives to Altium Designer for a variety of platforms, including Windows, Linux, Mac, Web-based and Flathub apps. The best Altium Designer alternative is KiCad, which is both free and Open Source. Other great apps like Altium Designer are Fritzing, Square Sketch, Autodesk EAGLE and QUCS.
Virtual Breadboard for Arduino is a learning 'app' version of VBB designed to help you take the first steps in the exciting world of physical computing with the Arduino microcontroller and ‘Breadboard’ based electronic circuit models.
Flux is where engineers shape the future of hardware, together. Contribute to the open source community, manage your projects, review schematics like a pro, track issues and features, power your workflows, and secure work before you commit it.
CR-8000 is a comprehensive PCB design suite that enables the development of a product from concept to manufacturing. CR-8000’s fully integrated design flow ranges from initial system planning, where critical design decisions are made about design partitioning, component...
Professional electronics schematic and PCB (Printed circuit board) design package
Livewire is a sophisticated software package for designing and simulating electronic circuits.
Circuit Wizard is a revolutionary new system that combines circuit design, PCB design, simulation and CAD/CAM in one complete package.
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:
The main home page for the Robot Room Copper Connection PCB editing software. The Copper Connection application lets you design circuit boards.
With Sprint-Layout you can design your PCB’s quick and easy. There is no unnecessary “ballast” which makes it difficult to keep the overview or which makes the usage almost impossible. Because of the logical and understandable strucure of Sprint-Layout the usage is very easy to...
PCB Design Software, Schematic Capture Software and automatic 3D model generation. The PCB layout generates 3D models automatically
Now even better: FluidDraw stands for fast and easy standardised documentation of your machines or systems. With the new FluidDraw P6, you can create pneumatic and electric circuit diagrams even more reliably and efficiently.
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Low cost, powerful program