Gnetlist is a netlist generation program. It takes .sch (schematic)
and .sym (symbol) files and converts them into netlists.  Gnetlist is
currently a text based utility and will probably remain one.
Gnetlist is a part of gEDA.

  gEDA is a collection of tools which are used to make electrical
circuit design, simulation and prototyping/production easier/doable.
gEDA is a project, which was started because of the lack of free EDA
tools for UNIX.  All of the tools in gEDA are released under the GNU
Public License version 2 (GPL).