Package magic

A very capable VLSI layout tool

http://opencircuitdesign.com/magic/index.html

Magic is a venerable VLSI layout tool. Magic VLSI remains
popular with universities and small companies.

Magic is widely cited as being the easiest tool to use for
circuit layout, even for people who ultimately rely on commercial
tools for their product design flow.

General Commands

ext2sim convert hierarchical ext(5) extracted-circuit files to flat sim(5) files
ext2spice convert hierarchical ext(5) extracted-circuit files to flat spice files
magic VLSI layout editor

File Formats

cmap format of .cmap files (color maps)
displays Display Configuration File
dlys format of .dlys files read by the SCALD simulator and timing verifier
dstyle format of .dstyle files (display styles)
ext format of .ext files produced by Magic's hierarchical extractor
glyphs format of .glyphs files
mag format of .mag files read/written by Magic
net format of .net files read/written by Magic's netlist editor
sim format of .sim files read by esim, crystal, etc.