MakeMeAPassword is an online program that lets you to make secure password string containing spaces special characters, numbers, etc. Here you find lots and lots of password of different types and you can chose for your emails, online logins, etc.
This site is a sister concern site of HowSecureIsMyPassword where you can test the strength or security of of your password.
MakeMeAPassword has a simple interface with just a button to generate password, and check boxes to add numbers and special characters to them. I personally used the website to get me a stronger password.
Read article about HowSecureIsMyPassword.