While I am reading YII Framework, I found some helpful resources, here the 2 among them:

JS Beautifier

http://jsbeautifier.org/ is a online JavaScript indentation adjustment tool, also makes JSON/JSONP readable, etc. A good online tool worth to bookmark:

http://jsbeautifier.org/   (online JavaScript Format Optimize Tool)

Markdown

Markdown is a text-to-HTML conversion tool for web writers. Markdown allows you to write using an easy-to-read, easy-to-write plain text format, then convert it to structurally valid XHTML (or HTML).

Thus, “Markdown” is two things:
(1) a plain text formatting syntax; and
(2) a software tool, written in Perl, that converts the plain text formatting to HTML.

Markdown: http://daringfireball.net/projects/markdown

I am afraid that github.com’s README.md is using Markdown: The md means MarkDown.