Kontact is a classical Free Software project. It has contributors all over the world with different backgrounds and interests but with the common goal to work on Kontact and make it a good application.
Communication and coordination between developers is one crucial point of the project. Many different tools are used for this purpose, e.g. CVS, Bugzilla, IRC, mailing list, web pages, Wikis and more. The central place for communication is the kde-pim mailing list which has around 400 subscribers. More informal discussions as well as communication among developers working together for example during bug fixing sessions happen on IRC. Because contributors are distributed over many different time zones there is activity in the Kontact IRC channel almost 24 hours a day.
Personal meetings have become increasingly important and shown to be essential for efficient discussion of technical questions or common work on code as well as for fostering the relationships between the developers and increasing motivation and community feeling. Usually developers meet on trade shows or on the regular yearly KDE-wide meetings, but in the past year and a half dedicated meetings of the group of kdepim developers have also been established.