Two of the most popular control panels are Plesk and cPanel. These are web-based graphical control panels that allow you to easily and intuitively administer websites, DNS, e-mail accounts, SSL certificates and databases. However, they are both proprietary software. Hosting providers will charge a monthly fee for these control panels to be installed on a server. Fortunately, there is a wide range of open source software available to download at no cost that offers a real alternative to these proprietary solutions. Web hosting control panels offer an attractive solution to developers and designers that host multiple web sites on virtual private servers and dedicated servers. This type of server management software simplifies the process of managing servers. By offering an easy to user interface, the control panels avoid the need to have expert knowledge of server administration.