Apache is a free and open-source cross-platform web server software.
Facebook pixel is an analytics tool that allows you to measure the effectiveness of your advertising.
Google Analytics is a free web analytics service that tracks and reports website traffic.
Google Tag Manager is a tag management system (TMS) that allows you to quickly and easily update measurement codes and related code fragments collectively known as tags on your website or mobile app.
RequireJS is a JavaScript library and file loader which manages the dependencies between JavaScript files and in modular programming.
WhatsApp Business is a free to download app available on Android and iPhone using which businesses can connect with their customers.