Alternatives to Qucs-S
An open-source circuit simulator interface that drives SPICE engines such as Ngspice. The listings below can replace it for an important use case. Each note says what changes if you switch.
The original
Qucs-S
An open-source circuit simulator interface that drives SPICE engines such as Ngspice.
Replacements
Listings that take over the same core job as Qucs-S.
LTspice
A free SPICE circuit simulator with schematic capture and a waveform viewer, from Analog Devices.
LTspice is a free, closed-source SPICE simulator from Analog Devices with its own schematic capture and waveform viewer, running on Windows only rather than across three platforms.
ngspice
An open-source SPICE simulator for analog, digital and mixed-signal electronic circuits described as netlists.
ngspice is the SPICE engine used directly from the command line with netlists, offering mixed-signal simulation but no graphical schematic entry like Qucs-S provides.
Proteus Design Suite
Electronics design software combining schematic capture, circuit and microcontroller simulation, and PCB layout.
Proteus Design Suite adds microcontroller firmware simulation and PCB layout to schematic capture, but it is commercial, closed source and runs only on Windows.
Similar software
Related functionality, not a direct replacement.
KiCad
A full electronics design suite: draw the schematic, lay out the board, view it in 3D, send it to a fab.
Lepton EDA
An open-source electronic design automation suite for schematic capture and netlisting, forked from gEDA.
LibrePCB
A free, open-source electronics design suite for drawing schematics and laying out printed circuit boards.
Fritzing
Document electronics projects with breadboard, schematic and PCB views.
