WHMCS is currently the most popular, leading domain and hosting marketing & customer management system, as well as the most complete billing & support solution. It has very humanized design in the aspects of user management, financial management, domain interface, server management panel interface, and more. It can perfectly cooperate with cPanel/WHM/DirectAdmin/Plesk and so on popular hosting management software, offers online ordering, on-line payment, customer support and so forth all sorts of commonly used functions. In short, it has already been familiar to, understood and used by more and more webmasters around the world.

As of writing this post (at least 5 months ago), AppNee is officially ready to move to a VPS hosting. But because the server administrator was accustomed to use the popular, simple and friendly inbuilt cPanel web hosting control panel (WHCP) on a shared hosting, at the very start, operating a VPS under the command line (via Linux Terminal) is confusing, very ungainly and inefficient. Fortunately, we eventually realized that after buying a new VPS, AppNee must start to install and use an open-source, free web hosting control panel to replace the cPanel, with which we can easily set the server and manage websites inside as before - in a visual and efficient method.