cPanel is the most widespread Control Panel instrument on the hosting market. It's feature-rich and it has an easy-to-use interface which will offer you full control of your Internet sites. It's easy to manage files, e-mails and databases, take a look at usage statistics, set up script-driven apps, etcetera. The software is preferred by many website hosting companies, because it also has a reseller counterpart named WebHost Manager (WHM). The aforementioned tool will provide you with a web-based graphical interface, via which you'll be able to manage numerous server-side settings, generate website hosting plans or new customer accounts and modify their features with only a couple of clicks. You may also install different modules and applications, modify DNS records, brand the cPanel accounts that your clients will get, add and remove features from their Control Panels, and many others. cPanel and WHM are supported by nearly all billing applications out there, so this is one of the best platforms in case you would like to become a reseller.