Apache is a free and open-source cross-platform web server software.
Nuxt is a Vue framework for developing modern web applications.
Phusion Passenger is a free web server and application server with support for Ruby, Python and Node.js.
Vue.js is an open-source model–view–viewmodel JavaScript framework for building user interfaces and single-page applications.
WhatsApp Business is a free to download app available on Android and iPhone using which businesses can connect with their customers.