ngspice topic
qucs_s
Qucs-S is a circuit simulation program with Qt-based GUI
OpenRAM
An open-source static random access memory (SRAM) compiler.
PySpice
Simulate electronic circuit using Python and the Ngspice / Xyce simulators
eSim-Cloud
A web-based system for designing and simulating electronic (eSim) and Arduino circuits.
MCUSim
MCUSim is an XSPICE library with microcontrollers.
spicegui
Graphical user interface for circuit simulation on GNU/Linux using ngspice
spyci
A tiny Python package to parse spice raw data files.
EEsim
A browser-based SPICE circuit simulator
node-ngspice
A frontend for NgSpice. (Archived and no longer maintained)
flipflop_demo
Flip flop setup, hold & metastability explorer tool