I do not know of an exact program to use. But, below are two URLs that contains some PIM software programs that run on LINUX.
As long as you export from Organizer as text, you should be able to import in those programs.
|Web Page Title||Web Page URL|
|Linux Personal Information Managers||http://linux.about.com/od/softpim/Linux_Personal_Information_Managers.htm|
|List of personal information managers||http://en.wikipedia.org/wiki/List_of_personal_information_managers|