High Quality Content by WIKIPEDIA articles! Claris Organizer is a personal information management (PIM) software program for the Mac OS that Claris acquired from a small company called Trio Development and sold during the 1990s. Trio Development was founded by James Harker, Jack Welde and Joseph Ansanelli , afterward joined by Seth Odam. It was sold to Palm when Claris was broken up, and was used as the basis for the Palm Desktop for Mac.