kcrontab is currently without an own site on the net. We are trying to get a website up and running in the near future. For the time is the primary site for updates and patches will be:
You might also subscribe to the mailinglist kde-announce. Release announcements of kde-software developers are posted to this list. We will also announce new releases of kcrontab in this list. For information about how to subscribe please point your browser to www.kde.org.