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:
No, the LHC hasn’t shown that we live in a multiverse (Synopsis) - “Which is more likely? That the universe was designed just for us, or that we see the universe as having been designed just for us?” -Michael Shermer One o...
12 hours ago