Useful Websites You Wish You Knew Earlier!

There are over 1 billion websites on the world-wide web today. This milestone was first reached in September of 2014, as confirmed by NetCraft in its October 2014 Web Server Survey and first estimated and announced by Internet Live Stats. So, Here is list of 10 useful websites out of 1 billion that you wish you would know earlier. (We have excluded basic sites which might be known by many)
1) https://mailinator.com/ :
Mailinator is a different kind of email service. The biggest difference is that you don’t need to sign up. Any email name you can think of already exists @mailinator.com and you can use any of them. Other services let you “own” email addresses. All email is public.
You cannot send email from Mailinator. After several hours, all email is auto-deleted.
Usefulness:
If you want to use any online services and they want email and password first. Then you can create a temporary account by providing email id and password for any mailinator email id. And their unwanted promotional messages will not be of any worry to you.