Also responsible for Magic [1],[2] which is the basis (AFAIK) for the efabless route to getting your own chip designed these days...

I ported it to the Mac and played with it a while back with the intention of making my own chip, but priorities changed when my wife fell very ill.

[1] https://en.wikipedia.org/wiki/Magic_(software)

[2] http://opencircuitdesign.com/magic/