Please read the pinned topic How to Request an App if your not certain on how to make a request, then add the necessary info back into this thread.
updated:
taken from the Guest posters link
Spice and Probe, Version 6.1 (July 1994) for DOS.
* * * *[*]PSpice is the circuit analysis "engine" that does many kinds of analysis* (DC, AC, transient, transfer function, et al).
* * * *[*]Probe is a software "oscilloscope" that presents graphs of analysis data.
* * * * Examples include voltage vs. time, current vs. frequency, current vs. voltage.