cPanel is the most popular Control Panel tool on the web hosting market. It is feature-rich and has an easy-to-use interface which will offer you full control of your web sites. It is easy to manage files, e-mail addresses and databases, view usage statistics, install script-driven apps, and many others. The software is preferred by many website hosting companies, due to the fact that it also has a reseller counterpart called WebHost Manager (WHM). This tool will provide you with a web-based graphical interface, via which you are able to control many server-side settings, create web hosting packages or new customer accounts and modify their features with just a couple of clicks. You can also set up different modules and applications, customize DNS records, brand the cPanel accounts that your customers will get, add and remove features from their Control Panels, etcetera. cPanel and WHM are supported by nearly all billing applications out there, so this is one of the best platforms in case you wish to become a reseller.