cPanel is the most popular Control Panel tool on the hosting market. It's feature-rich and has an easy-to-use interface that will offer you full control of your sites. You can easily take care of files, e-mails and databases, take a look at usage statistics, set up script-driven apps, and many others. This software is preferred by many hosting companies, because it also has a reseller counterpart named WebHost Manager (WHM). The aforementioned software tool will provide you with a web-based graphical interface, through which you can control a lot of server-side settings, create web hosting packages or new customer accounts and change their features with only a few clicks. You may also set up different modules and apps, change DNS records, brand all of the cPanel accounts that your customers will get, create and remove features from their Control Panels, and many others. cPanel and WHM are supported by almost all billing apps out there, so this is one of the top platforms in case you would like to become a reseller.