This distribution is just a reworked version of the c. 1989 Berkeley espresso source code. All I've done is cut the number of files down to just what is required for a modern POSIXy OS and made those files more ISO-C compliant. This should make building espresso a little easier in these more standards compliant times. See the file COPYING for the original code licence. All kudos to the original authors. - Andrew
hitarthk/espresso-logic-minimizer
This is just a copy so it won't get lost to the sands of time or a deletionist Wikipedia editor in the Wikipedia article on the Expresso Logic Minimizer. I actually have no expertise whatsoever on this.
CNOASSERTION