What is Citrix Xenapp?

Citrix XenApp is a product developed by Citrix Systems, an American multinational software company. The XenApp application allows Microsoft Remote Desktop Session to Host desktop sessions and applications to users through the Citrix HDX protocol. Citrix XenApp and Remote Desktop Services allow Windows applications and computing resources to be centrally managed in a secure data center. It allows users to access the applications from anywhere and from non-Windows clients.

A XenApp environment consists primarily of a multi-user operating system, a XenApp software and client devices. Citrix XenApp is available in multiple editions, each with different features and prices. Edition names include Citrix XenApp Fundamentals, XenApp Advanced, XenApp Enterprise, and XenApp Platinum. Citrix XenApp has had many names during its life time, including MetaFrame, MetaFrame XP, MeteFrame Presentation Server, and Presentation Server.

(source: Wikipedia)