Presentation Software I would like to make a series of mathematical lessons to upload on YouTube. Many mathematical lessons on YouTube that I've watched just video film a presentation on blackboard or paper. The disadvantage is that it is not easily editable. Is there any software application (or a combination of applications) that makes it easy to make beautiful mathematical presentations?
 A: Note: This solution is for Mac only. There are some programs for Linux/BSD that are similar to LaTeXiT but my experience with them has been less than stellar.
I know that people really love Beamer and other TeX presentation programs but they have a big flaw (in my mind): They don't let you customize the design of your presentation.
I recommend Keynote + LaTeXiT. You can make some very beautiful Keynote presentations and LaTeXiT [0] lets you add in math to documents as SVGs (e.g. you get control of how big your equations are without image degredation). 
The person who inspired me to make the switch is Daniel Baumann [1]. His website has tons of examples. 
[0] LaTeXiT: http://www.chachatelier.fr/latexit/
[1] Baumann: http://www.damtp.cam.ac.uk/user/.... Examples of his presentations can be found here: http://www.damtp.cam.ac.uk/user/...
Please also refer to the following link:https://academia.stackexchange.com/questions/301/how-to-make-a-presentation-that-includes-math-symbols
A: This may seem lame, but there is a free powerpoint add-in that inserts $\LaTeX$ math as pictures and allows editing. 
Go to IguanaTex and download the addin. The toolbar has two main buttons. New and Edit equations for adding a new equation, or editing an existing one.

Here is what the edit looks like on the screen:

A: One thing you may want to consider is Prezi. This may cost you money (that's why I am not linking to it here), I am not sure, but it makes for extremely attractive presentations.
