Why resurrecting Berkeleys Spice ?
Berkeley’s Spice can be considered the father of most circuit simulators available today. It is an old but still good piece of software, it may not be the fastest or the most reliable but it’s free, it’s available in source code and most of the electrical simulators inherited it’s syntax. On the more technical side, spice3 uses good numerical algorithms (most commercial implementations have only strengthened them), implements most of the models for MOSFET submicron designs and has a powerful set of analyses. On the more “social” side, spice3 it’s well introduced in the academic environment.