It’s time for Eventy to also be available for WordPress. And here it is. Eventy Basic (free) and Eventy PRO ($29) aren’t exact copy of the standalone software but they work around the same idea. Events are displayed on a monthly calendar. Calendars are just custom post type in WordPress. In the PRO version you can have multiple calendars, each one showing different events.
If you hesitate about purchasing just try the free version. It’s also available at the WordPress repository.