Font Awesome is a font and icon toolkit based on CSS and Less.
Nginx is a web server that can also be used as a reverse proxy, load balancer, mail proxy and HTTP cache.
Particles.js is a JavaScript library for creating particles.
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.
Vimeo is a video hosting, sharing and services platform. Vimeo operation an ad-free basis by providing subscription plans.