All parts in Berkeley Spice 3F5 and XSpice are included in the parts library. Many digital parts from the most popular libraries. Parts from vendors such as AMP, APEX, Burr-Brown, Comlinear, Elantec, Linear Technology, Maxim, Motorola, National Semiconductor, Texas Instruments, and more.

Many types of parts specified as subcircuits including Zener diodes, power MOSFET's, operational amplifiers

Many types of digital parts, including gates, inverters, counters, registers, buffers, coder/decoders, mux/demuxes, and more.

Additional parts specified at a behavioural level including:

Analogue phase locked loop, continuous S domain transfer function, peak detector, sample and hold circuit, Schmitt trigger/ bistable network, voltage noise source, current noise source, piecewise linear system, discrete time Z domain transfer function, and operational amplifier.

These behaviour model parts can be customized from their behavioural parameters Resistor, Capacitor, Inductor, Coupled inductors, diode, switches, Bjt, jfet, mosfet (all 6 models), mesfet, lossless transmission line, lossy transmission line, uniform RC line, Controlled sources, voltage and current sources. Arbitrary source which can be used to model non-linear resistors and other parts. Parameterised sub circuits give you the ability to alter sub circuit part behaviour.

Import your existing SPICE subcircuits and models into parts library.
Easily create and modify parts in database.
Modify symbols for the parts.
Match up symbol pins with model pins to reliably create parts.
Modify parameters for behavioural models.
Modify parameters for all Spice models.
Specify manufacturer, description, and category for parts and models.
Parts, models, and symbols are stored in a Microsoft Access database file.

Run simulation directly from schematic, or from a text window containing a spice deck 32-bit code:
DC Bias, DC Sweep, AC Sweep, Transient, Monte Carlo, Noise, Distortion, Fourier, Pole/zero, sensitivity, and transfer function simulations Show Device and Model parameters in a text window after the simulator has calculated them.
Full set of SPICE and XSpice options, including error tolerances, iteration limits, MOSFET defaults and more.
Pause or stop simulation at any time.
Digital command and vector files give you complete control over digital simulations.
view simulation results as the data is being collected.
Intuitive interface for setting bias point initial guess and transient initial conditions.
Multifunction signal generators (sine, single frequency FM, exponential, pulse, sawtooth, triangle, piecewise linear).
Multimeters (measure DC or AC voltage, current).
Unlimited number of instruments.
Full screen analogue waveform analysis.
Full screen digital trace.
View any number of waveform simultaneously.
Plot voltage, current, frequency response and dc characteristics.
View results in tables and/or graphs.
Log of simulation progress, errors, warnings, and statistics provided with each simulation run.

Zoom in or out on a specific point with a magnifying glass cursor.
Stretch the plot horizontally or vertically.
Squeeze the plot horizontally or vertically.
Scroll around the graph.
Create your plots by simply entering mathematical expressions.
Value labelling of the X and Y axes for all graphics windows.
Find and label maximums and minimums.
Group plots by families or control them individually.
Measurement of differences between specific points on a graph.
Measurement cursors provide quick and accurate measurements in all analysis windows.
Non-linear math functions.
Ability to include "deep" plots of sub circuit nodes.
Highlight any plot by clicking on its name in the legend.
Zoom in on any plot in the graph by control-clicking on its name.
Unlimited number of plots.
Set plot colours.
Show or hide any plot.
Set graph font.
Set log or linear scales for x and y axes.
Set graph title.
Specify engineering or scientific notation.
Copy graph picture to the clipboard for pasting into other applications.
Print graph to any output device.