cPanel is the most popular Control Panel tool on the hosting market. It is feature-rich and has an easy-to-use interface that will offer you full control over your sites. You can easily take care of files, e-mails and databases, take a look at usage statistics, install script-driven apps, and many others. This software is preferred by many website hosting companies, since it also has a reseller counterpart called WebHost Manager (WHM). This instrument will offer you a web-based graphical interface, via which you'll be able to control lots of server-side settings, generate website hosting plans or new customer accounts and change their features with only a few clicks. You may also set up different modules and applications, modify DNS records, brand the cPanel accounts that your clients will get, create 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 top platforms in case you would like to become a reseller.