JSim

JSim is a Spice-like simulation software

It can be downloaded from this link

http://www0.sun.ac.za/ix/?q=tools_jsim

The Windows binaries can be downloaded and are run by navigating to the containing folder in cmd, and then run with the command: jsim_n.exe <filename>

The Linux/Mac files also work, these can be downloaded and compiled by navigating to the unzipped folder and running the command: make -f Makefile

(or alternatively by compiling the main_n.c file in gcc)