Login to the best Web services

On the web, there are millions of websites. But some of them are specially famous and successful.
To register (sign in) is the first step to use a website such as : Facebook, Twitter, Gmail, ...
After registration, you have to log in each time you want to use these services. 

We had the idea to gather the login links to all the famous web services on a single page.

Find below the direct login links to 10 famous websites.
Chose the service you want, and login* using your username and Password .

* Login (or logging in): To start a session with a system. 
Verbs : To log in = to sign in
Synonymes: Login = signin = logon
Opposite: Logout