RemoteApp enables you to make programs that are accessed remotely through Remote Desktop Services appear as if they are running on the end user's local computer.
RemoteApp enables you to make programs that are accessed remotely through Remote Desktop Services appear as if they are running on the end user's local computer. These programs are referred to as RemoteApp programs. Instead of being presented to the user in the desktop of the Remote Desktop Session Host (RD Session Host) server, the RemoteApp program is integrated with the client's desktop. The RemoteApp program runs in its own resizable window, can be dragged between multiple monitors, and has its own entry in the taskbar. If a user is running more than one RemoteApp program on the same RD Session Host server, the RemoteApp program will share the same Remote Desktop Services session.
(http://technet.microsoft.com/en-us/library/cc755055.aspx)
Use this tag for questions about accessing RemoteApps through a client or for asking if a specific software program is compatible with RemoteApp. Questions about configuring RemoteApp on a server for deployment in an enterprise environment are off-topic and belong on Server Fault.