Add an iCal feed to your site for the Events Calendar plugin
You can subscribe to an iCalendar or two iCalendars and display them on your page
An extension for the Wordpress plugin WP Calendar, which generates iCal / RFC5545 / RFC2445 conform files.
Add an iCal feed to your site for the Events Manager plugin
Add alarm/alert to iCal feed created from The Events Calendar PRO plugin.
Fix import of calendar events from The Events Calendar to Outlook.