Bootstrap is a free and open-source CSS framework directed at responsive, mobile-first front-end web development. It contains CSS and JavaScript-based design templates for typography, forms, buttons, navigation, and other interface components.
ASP.NET is an open-source, server-side web-application framework designed for web development to produce dynamic web pages.
reCAPTCHA is a free service from Google that helps protect websites from spam and abuse.
SweetAlert2 is a JavaScript library that provides customisable, visually appealing, and responsive alert and modal dialog boxes for web applications.