Solutions taken from ftp://tug.ctan.org/pub/tex-archive/info/Free_Math_Font_Survey/survey.html in TUG.
Use either txfonts or mathptmx for Times font support. I
  personally prefer txfonts since its mathcal symbols look more
  natural to me.
To use: include \usepackage{txfonts} or \usepackage{mathptmx} in
  the preamble.
Personally the most comfortable Sans Serif fonts are Palatino or Kerkis. The usage is a bit different:
- Palatino: use any of the following: pxfonts,mathpazoormathpple. For me pxfonts looks more professional like in textbooks.
- Kerkis: need to include \usepackage{kmath,kerkis}
Optionally kurier or arev can also be used. But I don’t their
  appearances.
The sfmath package with no Greek font support. You need to include
  additionally the sansmathfonts package to enable Greek fonts, but
  again the support for some features like mathcal or mathscr are broken.
For art-type fonts that may appear on cover, I recommend to use the
  euler or eulervm. The latter can handle missing fonts as closest
  resemblance to ComputerModern.
Just notices how much the TeX community has evolved over years! Now my main workflows use XeTeX / LuaTeX with unicodemath. STIX2-math and Fira-math are quite good and stable to use for serif / sans purposes.