automatic password generator

I have heard that there is a way to make one password that can be used for all your logins but it is still secure because the company who stores the password makes a random password for every site you log into.

What is the best company for this? I have so many password as this point and I hate remembering all of them especially for websites I work on.

Thanks

https://lastpass.com/

I recommend you to use the next service
identitysafe[dot]norton[dot]com/password-generator