There is no Palm Desktop application available for Linux or other Unix platforms. Addition has, however, made a special conduit using the syncbuilder Java framework so that users can also interact with Addition4Palm from their Linux machines.
The java synchronization was meant to Addition4Palm's users synchronize their sheets on Unix based platform. It runs on any java enabled platform, although for Windows and Macintosh users it is recomended the synchronization through the HotSync Manager.