wp-event-manager

WP Event Manager is a lightweight, scalable and full-featured event management plugin for adding event listing functionality to your WordPress site. The shortcode lists all the events, it can work with any theme and is really easy to setup and customise. Maintained by wpeventmanager on GitHub, where it has earned 40 stars from the community.

It's actively developed around wordpress, plugins, calendar, and is a solid reference for anyone building with these tools.