Sauce Labs - Test mobile or web apps instantly across 700+ browser/OS/device platform combinations - without infrastructure setup.

Cobalt Strike - Advanced threat tactics for penetration testers.

CrossBrowserTesting - Browser Testing made simple! Run automated, visual, and manual tests on 1500+ real browsers and mobile devices. Test more browsers, in less time.

Shodan - Shodan is the world's first search engine for Internet-connected devices.

Browsershots - Browsershots makes screenshots of your web design in different browsers.

Censys - Censys helps organizations, individuals, and researchers find and monitor every server on the Internet to reduce exposure and improve security.