Test, scrape, generate, and automate without the pain and expense of hosting your own headless browsers.

Selenium automates browsers. That's it! What you do with that power is entirely up to you.

Voiden is a developer-first API client with local storage, Git-integrated, all based on markdown + offline support.

Design, debug, and test APIs locally or in the cloud

Simulate APIs, integrations, and environments at enterprise scale.

Burp or Burp Suite is a set of tools used for penetration testing of web applications. It is developed by a company named Portswigger who make freely available a Web Security Academy which has a range of lessons on penetration testing.