Markdown
Markdown is an amazing markup language. Its main strength is its simplicity, and the other one is its omnipresence.
This is what most developers use to write readmes, documentation, books, websites etc.. For example all of the textual content of this website is written in Markdown (using a static site generator).
Here are the features you will use the most :
# Title
## Subtitle
### Sub-subtitle
*italic text*
**bold text**
[a link](https://github.com/adam-p/markdown-here/wiki/Markdown-Cheatsheet)
- A
- bullet
- point
- list
Which renders as :
Title
Subtitle​
Sub-subtitle​
italic text
bold text
- A
- bullet
- point
- list
tip
As you can see the Markdown syntax is very light and doesn't hurt the source text's libility (unlike html).
You can learn more about the Markdown syntax here.