cPanel is the most widely used Control Panel instrument on the hosting market. It is feature-rich and it has an easy-to-use interface that will give you full control of your sites. It is easy to manage files, emails and databases, view usage statistics, install script-driven apps, and the like. The software is preferred by many hosting companies, since it also has a reseller counterpart called WebHost Manager (WHM). The aforementioned tool will provide you with a web-based graphical interface, through which you can control a lot of server-side settings, generate hosting packages or new customer accounts and modify their features with only a few clicks. You may also install different modules and apps, modify DNS records, brand all of the cPanel accounts that your customers will get, add and remove features from their Control Panels, etcetera. cPanel and WHM are compatible with nearly all billing applications out there, so this is one of the top platforms in case you would like to become a reseller.