cPanel (with its backend WHM) is the most popular control panel currently used by web hosts.
cPanel is able to successfully do everything in regards to what a control panel is, and a whole lot more. Providing instant information on the server and account status, cPanel lets an end-user easily and quickly manage their website.
cPanel's is backed by WHM, which is the automated backend to the system. WHM allows the web host to create domains, manage nameservers, and a whole lot more.