Apache is a free and open-source cross-platform web server software.
Clicky is web an analytics tool which helps you to get real-time analysis including spy view.
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.
PayPal is an online payments system that supports online money transfers and serves as an electronic alternative to traditional paper methods like checks and money orders.