eXtcal is a simply event manager which is developed exclusively for XOOPS.
You can download the module here : http://dev.xoops.org/modules/xfmod/project/showfiles.php?group_id=1092]Dev.xoops.org

For the moment you can submit new events by admin menu and manage events by category. The next version will have more feature like goup perm to allow group to view or/and post event, notification system for event submit and 2 more blocks (a block like spotlight for event and another to display the number of upcoming and total event by cat). Moreover, we will link eXtcal module to news module to make news linkable with an event's date.

I hope you will like this module