Not so prominent I think but I'd like to mention that the *MathTime Professional 2* ([MTPro2][1]) fonts were designed by Michael Spivak of Publish or Perish Inc., [see here][2].


  [1]: https://www.pctex.com/mtpro2.html
  [2]: https://www.pctex.com/files/managed/5/55/MTProAnnals.pdf