Robert Thorpe <rt@robertthorpeconsulting.com> writes:

Hi Robert:

> What about writing a letter to your bank?  Or writing a short technical
> document that has to include diagrams?  Plain text can't really do these
> things.

Of course is can with a markup language.

> Latex can do these things, but it's complicated.  Whenever I need to
> use Latex I have to look at lots of examples from the internet or the
> last time I used it.  Since I never write large reports using Latex
> it's syntax never sticks in my head.

Org-mode[1] is your answer. It can do everything you listed with a simple
markup language.

Charles

Footnotes: 
[1] https://en.wikipedia.org/wiki/Org-mode
    http://orgmode.org/
    
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"We all know Linux is great...it does infinite loops in 5 seconds."
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Linux Symposium)