single-projects.php

<?php get_header(); ?>

<?php if ( have_posts() ) : while ( have_posts() ) : the_post(); ?>
	<div class="u-container u-section">
		<h1><?php the_title(); ?></h1>
		<?php the_content(); ?>
	</div>
	<div class="u-container u-section">
		<h2>Other projects</h2>
		<ul class="u-list-unstyled">
	    <?php
		    $thisPostID = get_the_ID();
            $args=array(
				'post_type'=>'projects'
                //'posts_per_page'=>-1 // Number of related posts to display.
            );
	        $my_query = new wp_query( $args );

	        while( $my_query->have_posts() ) {
	            $my_query->the_post();
				if($thisPostID != get_the_ID()) :
	        ?>
	        	<li><a href="<?php the_permalink(); ?>"><?php the_title(); ?></a></li>
	        <?php endif; }
	        wp_reset_query();
	    ?>
		</ul>
	</div>
<?php endwhile; else : ?>
	<div class="u-container">
		<h1>Not Found</h1>
		<p>Sorry, but you are looking for something that isn't here.</p>
	</div>
<?php endif; ?>

<?php get_footer(); ?>