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:
More Than Stars: The Milky Way’s Dust Mapped In 3D For The First Time Ever (Synopsis) - “Things need not have happened to be true. Tales and adventures are the shadow truths that will endure when mere facts are dust and ashes and forgotten.” -...
7 hours ago