cPanel is the most popular Control Panel instrument on the hosting market. It is feature-rich and it features an easy-to-use interface that will supply you with full control over your Internet sites. It's easy to manage files, e-mails and databases, view usage statistics, install script-driven applications, etcetera. The software is preferred by many hosting companies, because it also has a reseller counterpart called WebHost Manager (WHM). This instrument will provide you with a web-based graphical interface, via which you can manage a lot of server-side settings, set up hosting plans or new customer accounts and modify their features with just a few clicks. You can also install different modules and apps, change DNS records, brand all the cPanel accounts that your clients will get, create and remove features from their Control Panels, etc. 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.