How do I create index sites? Sitemap vs Site Index

Sitemap vs index site

I get confuse the different between sitemap and index sites. I have already created sitemap.xml, and submitted it to google, so that my sites url getting indexed quickly.

my sitemap.xml kinda look ugly, http://www.justinbieberzone.com/sitemap.xml and i dont wanna display it like that in the website.

Now, What I wanna do is to create index sites, index blogs, list of all my articles, whatever you call it, im not sure.

I’ve seen lot of websites and blogs has a page call, sitemap, but I call it site index, collection of the articles, easy to read.

I want the new index to appear on top, and the old one at the bottom.

What plugin should I use? thanks alot.