ngspice

Several bugs have been fixed, improving stability and reliability. A compatibility mode for dealing with other simulators was added. BSIM 4 was updated to release 4.6.5. BSIMSOI was updated to version 4.3.1. Transmission lines from kspice were updated and corrected. B sources were improved with a PWL function, the addition of "HERTZ", "time" and "temper" variables, and the addition of a Ternary function. PWL sources were improved with a repeat parameter (r=value) and a delay parameter (td=value).

The Tclspice simulator library has been merged with ngspice. New options have been introduced: brief, listing, autostop, and scale. Support for .lib files has been introduced. .measure statements: avg, integ, rms, max, min, delay, and param. .global statement support. .func macros for inlining functions into netlists. The numparam library has been improved to support fully parametrized netlists. BSIM model binning. New multi-input gate VCVS using XSPICE extensions.

A missing include file for the numparam library (parametric netlists) was added.

Most of the bugs have been fixed, so ngspice is
more stable, especially the xspice extension,
subcircuit handling, and numparam library. The
syntax has been expanded, allowing for end-of-line
comments. A ".global" card has beed added to
define global nodes. It is possible to define TC
for resistors on the instance line. The editline
library can be used instead of readline. ngspice
now works (with xspice) on Windows using
MINGW/MSYS.

Some segfaults of release15 were fixed.