I want to make an site for article posting like www.essence.com/2011/11/22/real-talk-shaq-cheating-is-disrespectful/. Can anyone help me how can i do this in K2. Is there any plugin/ component for making this type of article site.

You can use Joomla and K2 to make a site just like that.

K2 is the component you need. It can do most of the stuff on that page, you just need to set everything up correctly in your template