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:
Ask Ethan: Will The ‘Great Attractor’ Defeat Dark Energy? (Synopsis) - “We detect motion along this axis, but right now our data cannot state as strongly as we’d like whether the clusters are coming or going.” -Alexander Kashl...
1 day ago