The biggest node.js projects?

Question

JavaScript

What projects implemented on node.js managed to succeed? Know what PayPal uses.
And what other companies and projects are there that use mainly node.js and are quite popular in the world?

Answer 1

• walmart
  
• E-bay/PayPal
  
• Microsoft (Azure)
  
• LinkedIn
  
• Yahoo
  
• Google
  
• Yammer (acquired by Microsoft)
  
• Netflix
  
• Uber
  

source

Answer 2

All Twitter mobile traffic, on Express.

Answer 3

Frontend of many Yandex services on Node.js — Search, Images, Video, News, Mail, Disk, etc.