Ecwid is a shopping cart plugin that turns any existing website into an online store.
Elfsight is an all-in-one platform offering 70+ customisable widgets for websites.
Facebook pixel is an analytics tool that allows you to measure the effectiveness of your advertising.
Nginx is a web server that can also be used as a reverse proxy, load balancer, mail proxy and HTTP cache.
OneSignal is a customer engagement messaging solution.
WhatsApp Business is a free to download app available on Android and iPhone using which businesses can connect with their customers.