Deploy and test an Ubuntu VM for free (dies after 20 minutes of inactivity).
Has a browser file explorer, text editor and terminal. Allows ssh connections.
Free server. Low space and few tools (php, mysql, cron and ftp), but it’s free!
Free website hosting. Basic, but neat interface.
Check if you have an account that has been compromised in a data breach
Check the state of your browser’s TLS/SSL.
These allow you to inspect your HTTP POST requests, among other stuff.
Use YouTube to improve your English pronunciation. Real people, real situations, easy and fun to use.