TeX4PPT and TeXpoint. It's much more professional but it is not for free except for a one-month trial.
If you prefer knit clothing over latex, there are five relevant blogs:
Throwback Thursday: Top 5 Signs of New Physics (Synopsis) - “Other than the laws of physics, rules have never really worked out for me.” -Craig Ferguson When you think about the Standard Model of particle physics, y...
9 hours ago