Please, show me a way to set up Windows 7 machine to use only one app (internet explorer) to access remotely from another machine - similar to TS RemoteApp, which is only for Windows Server platforms as I understand...
As long as you are using a desktop version of Windows 7 which has Remote Desktop (non-home version) you can make a couple of changes in the registry and the .rdp file to enable RemoteApp. You do not need to use Windows Server. I do this on my HTPC which runs Windows 7 Ultimate.
You can use GoGlobal from Graphon. It does like rdp/Citrix, and can be installed on workstation. Yes, multiple users can use it without buying RDP/TSE license.
Free trial here: http://www.graphon.com/products-and-solutions/go-global-windows