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SimulIDE vs Coulomb: catalog facts
SimulIDE	Coulomb
Free Free and open source under the AGPLv3 licence.	Free Free and open source under the GPL-3.0 licence.
Linux	Linux
Simulates PIC, AVR and Arduino microcontrollers alongside analog and digital parts Built-in code editor and debugger with breakpoints	Plots voltage and current of components over time Clean GTK4 and libadwaita interface
Aimed at learning and hobby work rather than professional circuit design Debugging is described as basic	Simpler than SPICE-based tools Small project with a single main developer
Downloadable app	Downloadable app
Open source	Open source
License: AGPL-3.0	License: GPL-3.0-or-later
Not stated if an account is needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked October 1, 2026

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