The Remote Desktop client for Linux for access to Microsoft Terminal Server can be downloaded from here: http://www.rdesktop.org
It must be installed under /urs/bin/rdesktop.
The Citrix client for Linux for access to Citrix servers can be downloaded from the Citrix website.
The client must be installed under /usr/lib/ICAClient/wfica.
The Filezilla client for Linux for file upload and download can be downloaded from here: http://filezilla-project.org/download.php
It must be installed under /usr/ filezilla.