DistriFile.com was built from scratch using PHP, Boostrap 4 (alpha 2) and jQuery 2.2.
I built it to showcase and sell the DistriFile Self-Hosted File Server application that I also built.
The bulk of the page is a one page navigation with automatic scrolling for various parts. It is also translated in 5 other languages (Dutch, French, German, Russian and Spanish.)
A really cool feature on the backend of the site is the licensing function. Upon a new purchase, a unique license key is generated and sent to the customer along with installation instructions. The customer downloads a small “Easy Installer” file and then enters the purchase code. The purchase code is then decoded and validates the license key. If it is valid, the installation file will download the actual application files from distrifile.com to their server and begin installing. This is also used for updating as well.