Spice3
KJWaves - SPICE3 GUI and waveform viewer v.1.1.3
This program provides for easy modification and viewing of SPICE circuit files.
AIM-Spice Student v.5.6
SPICE is the most commonly used analog circuit simulator today and is enormously important for the electronics industry.
SIView Signal Integrity Viewer v.1.1
SIView is a signal integrity viewer for circuits.