I'm architecting a personal information manager middlewire for a commercial product. The PIM includes e-mail (from server , mobile devices), sms/mms, contacts, calendar, phonebook, call history, notes, task, reminder. It should supports e-mail sync/download form e-mail server and bluetooth enabled device as well. This is same for other PIM data. I'm looking for the componets or group of components for PIM available that will be used in linux environments. These components should cover miximum of the PIM items and functionalities and should if extendable.
Can anyone suggest me what are the best open source components availble that can be used for this product? Thanks in advance.

Regards,
Hossain Reja