1Password - 1Password can create strong, unique passwords for you, remember them, and restore them, all directly in your web browser.
How Secure Is My Password? - A tool for assessing your password strength
Avast Passwords for Mac - Free password manager from Avast
WeHatePasswords - Replace passwords on your site with cute pixel art.
LeakCheck - Data breach search engine, low price starting from $10/mo, one email address for free, unlimited API, 7B+ entries
Password-Generator.xyz - Generate Random Strong Password Online