Finding similar websites

What's the best way to find similiar websites?

I want to find to find similiar websites for

http://www.codeproject.com/

https://www.planet-source-code.com/

http://www.similarsites.com/

or try this related:www.facebook.com (in Google)

^I also googled but I want something reliable.

[quote=“armada, post:2, topic:14764”]

or try this related:www.facebook.com (in Google)

[/quote]

this one is better than every thing… IMO.

Googled and find a lot of websites.You have to see which one is old and professionally built.