Based on our record, Qucs-S seems to be more popular. It has been mentiond 7 times since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
When talking about open source tools, here are some: KiCad may be used as a schematic entry tool for ngspice, especially for discrete or PCB-based electronics. You may watch several simulation examples (including oscillators) here: https://forum.kicad.info/t/simulation-examples-for-kicad-eeschema-ngspice/34443. KiCad integrates ngspice internally, but may also provide external ngspice with netlists for simulation.... - Source: Hacker News / 11 months ago
Https://ra3xdh.github.io It's only missing a solid components library like LTSpice has. - Source: Hacker News / 11 months ago
You should consider using qucs-s https://ra3xdh.github.io/ a fully open-source fork of qucs still currently maintained and improved. - Source: Hacker News / 11 months ago
Https://ra3xdh.github.io/ (QUCS-S - seems to be active). Source: 12 months ago
Https://ra3xdh.github.io It's still missing a comprehensive component library like LTspice does, though. KiCad can also simulate circuits through NGSpice, but it's missing a library and suffers from a lot of quirks. - Source: Hacker News / over 1 year ago
Pspice - OrCAD PSpice technology provides the best, high-performance circuit simulation to analyze and refine your circuits, components, and parameters before committing to layout and fabrication
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PCBWeb - PCBWeb is a 100% free Windows desktop CAD application for designing and manufacturing electronics...
Circuit Simulator - Animated electronic circuit simulator using ideal components to visualize voltage and current.
PCB Wizard - PCB Wizard 3 is a powerful package for designing single-sided and double-sided PCBs.