PostgreSQL is at www.postgresql.org [1], and Python is at www.python.org [2]. RPMs and Debian packages, as well as sou rce code, are available for both of these tools.

The iCalendar module for Python is available from www.mxm.dk/products/public/ical/downloads [3].

For more detailed information about working with dates and times in PostgreSQL, a FAQ written by Josh Berkus is at techdocs.postgresql.org/techdocs/faqdatesintervals.php [4].

The Psycopg database adapter for Python and PostgreSQL is at initd.org/projects/psycopg1 [5].

You can download the latest build of the Mozilla calendar extension, or of the Sunbird standalone application, from www.mozilla.org/projects/calendar/download.html [6].

The RFC for iCalendar is available at www.ietf.org/rfc/rfc2445.txt [7].