Websites that have a shopping cart or checkout page, either using a known ecommerce platform or a custom solution.
Clicky is web an analytics tool which helps you to get real-time analysis including spy view.
Google Analytics is a free web analytics service that tracks and reports website traffic.
Histats is a simple website visitor analysis and tracking tool.
OpenResty is a web platform based on nginx which can run Lua scripts using its LuaJIT engine.
YouTube is a video sharing service where users can create their own profile, upload videos, watch, like and comment on other videos.