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Qucs-SLTspice
Free

Free and open source, supported by donations.

 Free

Free to download from Analog Devices.

Windows, macOS, Linux Windows
  • Graphical schematic entry for SPICE simulation
  • Windows installer bundles Ngspice
  • SPICE simulation with schematic capture in one program
  • Built-in waveform viewer for inspecting results
  • Simulation only; no PCB layout
  • macOS install goes through Homebrew
  • Simulation only, with no PCB layout
  • Details could not be confirmed from the official page at research time
Downloadable app Downloadable app
Open source Closed source
License: GPL-2.0 License not stated
No account needed Not stated if an account is needed
Works offline Not stated if it works offline

Checked September 23, 2026

Checked September 24, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.