FirstClass Client Download The Firstclass client software provides a desktop application that is optimized for fast, streamlined access to the FirstClass server. Choose the version you want to install: Mac             Windows         Linux FirstClass Palm Conduit Download FirstClass supports Palm™ Computing connected organizers (organizers, handhelds, or devices), and other handheld devices running Palm OS 3.1  and higher, and using Palm Desktop 4.1 and higher on Windows and Mac OS X. Choose the version you want to install: Mac             Windows