cPanel is the most widely used Control Panel instrument on the web hosting market. It's feature-rich and it comes with an easy-to-use interface which will provide you with full control of your sites. You can easily handle files, e-mail addresses and databases, view usage statistics, install script-driven apps, etcetera. This software is preferred by many hosting companies, as it also has a reseller counterpart called WebHost Manager (WHM). This software tool will give you a web-based graphical interface, through which you'll be able to control many server-side settings, generate hosting packages or new client accounts and change their features with only a couple of clicks. You may also install different modules and apps, adjust DNS records, brand all the cPanel accounts that your customers will get, create and remove features from their Control Panels, etcetera. cPanel and WHM are compatible with almost all billing applications out there, so this is among the best platforms if you wish to become a reseller.