Display a list of upcoming events with Event Organiser http://wp-event-organiser.com/ without repeating instances of recurring events.

upcoming-events.php

/**
* Display a list of upcoming events with Event Organiser without repeating instances of recurring events
**/

	//Get upcoming events for the next 6 months
	
	$events = eo_get_events(array(
		'event_start_after'=>'today',
		'event_end_after' =>'today',
		'event_start_before' => '+6 month',
		'showpastevents'=>true //Will be deprecated, but set it to true to play it safe.
  ));
 	//this is to collect event IDs that have been displayed
 	$seen = array();
 
	if( $events ):
		global $post;
		foreach( $events as $post ):
			setup_postdata($post);
			$counter = $post->ID;
			$format = ( eo_is_all_day() ? get_option('date_format') : get_option('date_format') . ' - ' . get_option('time_format') ); 
			//if this is an event we haven't seen yet, let it through
			if(!in_array($counter, $seen)): ?>
      				<article class="event">
					<?php the_title(); ?>
					<?php echo eo_get_the_start($format); ?>
					<?php the_excerpt(); ?>
				</article>
					
			<?php 	//add this events ID to the $seen array
				$seen[] = $counter; 
			endif; 
		endforeach;
		wp_reset_postdata();

	endif;