What are the top free domain name hosting sites?

Im creating a website and i was looking for a reliable free domain name hosting. Preferably one that just has .???, instead of .??.????. Any help appreciated, thanks.

How does domain hosting work for sites that later become exceptionally popular?

Say popular sites that we all visit, Google, Yahoo, popular messageboards, other search engines. When these sites initially start out do they use some average hosting site like Go Daddy, etc?

What are the most recommended free web hosting sites?

I’m planning to build a website but since geocities free hosting has shut down, I have to find another web host that is easy to use, navigate, has efficient web tools and has faster loading time. Could anyone share any web host sites and their advantages and disadvantages so I can compare which one is the best? Thanks.