Ko/Pi and Ka/Pi are the best parts of Cacko ROM I would say.
Ok the names kind of don't mean anything at first - but it refers to
KOrganisaer / Pi (Pi = platform independant or something like that) and Ka/Pi is KAddressbook.
So one is a Calendar and one is an addressbook. The advantage over Sharp Calendar and Addressbook - is that it is an integrated package - so you can link contacts from addressbook into your calendar events, see Calendar by various formats whcih Sharp calendar does not to - has a Todo , Agenda built into Calendar, has a notify icon (task bar iconkind of) to show whats next evets etc etc and I could go on and on.
Theres a whole thread on Ko applications in the applications or software thread .
And of course Ko/Pi comes with an alarm clock KAlarm or something like that.
Integration is the name of the Korganiser game.