Chandler: a freely available application suitable for office work.

Chandler is a full-featured PIM. Designed to run on most flavors of MS-Windows as well as Mac OS X and Linux, it will also run on most other UNIX-like systems. Everything in Chandler is integrated together to better enable information organization; included are a capable calendar (with iCalendar support), address book, bookmarks holder, etc. plus an e-mail application.