Drupical
We aggregate groups.drupal.org/events and make some manual improvements like adding the location, link, logo and so on and provide this information in a useful and nice way. If your event is missing, simply create it on the Drupal Groups Event site - some days later it will be listed on drupical.com. As Drupical was just released in BETA stage, not every event is listed yet and there are some tasks to improve and issues to fix.
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