DeHashed - DeHashed is the largest & fastest data breach search engine.
1Password - 1Password can create strong, unique passwords for you, remember them, and restore them, all directly in your web browser.
Snusbase - The industry leading database lookup.
Reveal - Facebook Ads automation & cross-platform analytics reports
LeakCheck - Data breach search engine, low price starting from $10/mo, one email address for free, unlimited API, 7B+ entries
The Password Meter - This application is designed to assess the strength of password strings