Following are features of Plesk Power Pack :
1) MS SQL Server Integration : It allows users to manage SQL server databases with a lot of ease. These also include remote instances of MS SQL Server Standard or Enterprise Edition.
2) Tomcat : This enables environment to execute Java Servlets. It also helps managing Tomcat applications to enable JSP support.
3) Multi-Level Helpdesk : It is a multi-purpose helpdesk mainly structured to manage all support issues which means you can organize support requests from one location.
4) Application Pack : Group of all applications such as Mambo(Site Builder), post-Nuke(CMS), osCommerce ( Mainly used for E-commerce website ), phpBB (forums), Gallery (Picture Gallery), phpBook, bbclone (Counter) and gtchat (Chat engine)
5) Coldfusion : With this feature, administrators can configure Coldfusion paths.
6) SpamAssassin : This helps eliminating Spam which is basically a Anti-spam software
Plesk Control Panel is supported on Linux as well as Windows VPS Hosting packages 