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 18 May 2013) - The best of the rest from the Physics arXiv preprint server Performance of a Remotely Located Muon Radiography System to Identify the Inner Structure of ...
1 day ago