AddThis is a social bookmarking service that can be integrated into a website with the use of a web widget.
Websites that have a shopping cart or checkout page, either using a known ecommerce platform or a custom solution.
Font Awesome is a font and icon toolkit based on CSS and Less.
JSDelivr is a free public CDN for open-source projects. It can serve web files directly from the npm registry and GitHub repositories without any configuration.
Nginx is a web server that can also be used as a reverse proxy, load balancer, mail proxy and HTTP cache.