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:
Other Interesting arXiv Papers (Week ending May 30, 2015) - The best of the rest from the Physics arXiv this week. Kinect Range Sensing: Structured-Light versus Time-of-Flight Kinect
7 hours ago