Plesk is the main competitor of CPanel and is a commercial application that works on Linux and Windows servers. Initially named Plesk, was renamed as Parallels Plesk Panel after being purchased by Parallels company.
Plesk allows server administrators or website owners to manage their servers as resellers or simply to manage their server from the perspective of a simple webmaster.
Instead dealing with server command line, this product provides an user friendly interface (GUI) that allows to perform a lot of tasks.
You can view information about server (configuration, components etc), manage IP addresses, add and set new domains or subdomains, schedule backups, create and manage email addresses, install SSL certificates and many more.
You can also install different extensions to enhance functionality. Their website provides a lot of tutorials and includes demos.
