Not sure I understand the question, but I can say Emerging Magazine is a free marketing and promotions site for anything from Artists to Product Manufactures

Facebook

I would have to say it is GOOGLE. I mean you can find anything there :)

I will say best free site is google.com. Why?

#This is totally free......!!!

#Greatest source of information and knowledge to research.
#I also give credit to google image because I often search images from here for my answer.
#It helps students by scholarship section.
#It also help blogger or site owner by adsense to make money.

GMAIL
#Gmail is also a great free service of google.com

#Currently I am using chrome to browse this question so I will give another credit to goooooooooooogle.

#Google analytics helps us(web developers) to make a good traffic.
#I also can use some other really great site by my google id like youtube.com

#Google maps help travelers. Sometime it also helps researchers.
#I think google shopping is another great service to shopping.

There are also many other cool products and service of google.com
So

I love Gooooooooooooole

@rudyj2112 What do you mean by "free-running website". Can you clarifiy the question.

Yahoo for email and Yahoogroups..
Google for best search engine, and adsense for earning
Mahalo and Mylot for best paid to earn..
donkeymails for best paid to click
care2.com for best Activist network
Facebook for best social network
Then my own website which is the same as my username for best personal project :) ..
youtube for best free videos