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