Apache is a free and open-source cross-platform web server software.
Debian is a Linux software which is a free open-source software.
HTTP Strict Transport Security (HSTS) informs browsers that the site should only be accessed using HTTPS.
Java is a class-based, object-oriented programming language that is designed to have as few implementation dependencies as possible.
Prototype is a JavaScript Framework that aims to ease development of web applications.
reCAPTCHA is a free service from Google that helps protect websites from spam and abuse.