EDD - Checkout Cart - If products are free, the price column states 'Complementary'. If the price of the cart is 0, it hides the cart total.

checkout_cart.php

<?php global $post; ?>
<table id="edd_checkout_cart" <?php if ( edd_is_ajax_enabled() ) { echo 'class="ajaxed"'; } ?>>
	<thead>
		<tr class="edd_cart_header_row">
			<?php do_action( 'edd_checkout_table_header_first' ); ?>
			<th class="edd_cart_item_name"><?php _e( 'Item Name', 'edd' ); ?></th>
			<th class="edd_cart_item_price"><?php _e( 'Item Price', 'edd' ); ?></th>
			<th class="edd_cart_actions"><?php _e( 'Actions', 'edd' ); ?></th>
			<?php do_action( 'edd_checkout_table_header_last' ); ?>
		</tr>
	</thead>
	<tbody>
		<?php $cart_items = edd_get_cart_contents(); ?>
		<?php if ( $cart_items ) : ?>
			<?php do_action( 'edd_cart_items_before' ); ?>
			<?php foreach ( $cart_items as $key => $item ) : ?>
				<tr class="edd_cart_item" id="edd_cart_item_<?php echo esc_attr( $key ) . '_' . esc_attr( $item['id'] ); ?>" data-download-id="<?php echo esc_attr( $item['id'] ); ?>">
					<?php do_action( 'edd_checkout_table_body_first', $item ); ?>
					<td class="edd_cart_item_name">
						<?php
							if ( current_theme_supports( 'post-thumbnails' ) && has_post_thumbnail( $item['id'] ) ) {
								echo '<div class="edd_cart_item_image">';
									echo get_the_post_thumbnail( $item['id'], apply_filters( 'edd_checkout_image_size', array( 25,25 ) ) );
								echo '</div>';
							}
							$item_title = get_the_title( $item['id'] );
							if ( ! empty( $item['options'] ) && edd_has_variable_prices( $item['id'] ) ) {
								$item_title .= ' - ' . edd_get_cart_item_price_name( $item );
							}
							echo '<span class="edd_checkout_cart_item_title">' . esc_html( $item_title ) . '</span>';
						?>
					</td>
					<td class="edd_cart_item_price">
						<?php
							if ( edd_get_download_price( $item['id'] ) == 0.00 ) {
								_e( 'Complementary', 'edd' );
							} else {
								echo edd_cart_item_price( $item['id'], $item['options'] );
							}
						?>
					</td>
					<td class="edd_cart_actions">
						<?php if( edd_item_quantities_enabled() ) : ?>
							<input type="number" min="1" step="1" name="edd-cart-download-<?php echo $key; ?>-quantity" class="edd-input edd-item-quantity" value="<?php echo edd_get_cart_item_quantity( $item['id'], $item['options'] ); ?>"/>
							<input type="hidden" name="edd-cart-downloads[]" value="<?php echo $item['id']; ?>"/>
							<input type="hidden" name="edd-cart-download-<?php echo $key; ?>-options" value="<?php esc_attr_e( serialize( $item['options'] ) ); ?>"/>
						<?php endif; ?>
						<a href="<?php echo esc_url( edd_remove_item_url( $key, $post ) ); ?>"><?php _e( 'Remove', 'edd' ); ?></a>
					</td>
					<?php do_action( 'edd_checkout_table_body_last', $item ); ?>
				</tr>
			<?php endforeach; ?>
			<!-- Show any cart fees, both positive and negative fees -->
			<?php if( edd_cart_has_fees() ) : ?>
				<?php foreach( edd_get_cart_fees() as $fee_id => $fee ) : ?>
					<tr class="edd_cart_fee" id="edd_cart_fee_<?php echo $fee_id; ?>">
						<td class="edd_cart_fee_label"><?php echo esc_html( $fee['label'] ); ?></td>
						<td class="edd_cart_fee_amount"><?php echo esc_html( edd_currency_filter( edd_format_amount( $fee['amount'] ) ) ); ?></td>
						<td></td>
					</tr>
				<?php endforeach; ?>
			<?php endif; ?>
			<?php do_action( 'edd_cart_items_after' ); ?>
		<?php endif; ?>
	</tbody>
	<tfoot>

		<?php if( has_action( 'edd_cart_footer_buttons' ) ) : ?>
			<tr class="edd_cart_footer_row">
				<th colspan="<?php echo edd_checkout_cart_columns(); ?>">
					<?php do_action( 'edd_cart_footer_buttons' ); ?>
				</th>
			</tr>
		<?php endif; ?>

		<?php if( edd_use_taxes() ) : ?>
			<tr class="edd_cart_footer_row edd_cart_subtotal_row"<?php if ( ! edd_is_cart_taxed() ) echo ' style="display:none;"'; ?>>
				<?php do_action( 'edd_checkout_table_subtotal_first' ); ?>
				<th colspan="<?php echo edd_checkout_cart_columns(); ?>" class="edd_cart_subtotal">
					<?php _e( 'Subtotal', 'edd' ); ?>:&nbsp;<span class="edd_cart_subtotal"><?php echo edd_cart_subtotal(); ?></span>
				</th>
				<?php do_action( 'edd_checkout_table_subtotal_last' ); ?>
			</tr>
			<tr class="edd_cart_footer_row edd_cart_tax_row"<?php if( ! edd_is_cart_taxed() ) echo ' style="display:none;"'; ?>>
				<?php do_action( 'edd_checkout_table_tax_first' ); ?>
				<th colspan="<?php echo edd_checkout_cart_columns(); ?>" class="edd_cart_tax">
					<?php _e( 'Tax', 'edd' ); ?>:&nbsp;<span class="edd_cart_tax_amount" data-tax="<?php echo edd_get_cart_tax( false ); ?>"><?php echo esc_html( edd_cart_tax() ); ?></span>
				</th>
				<?php do_action( 'edd_checkout_table_tax_last' ); ?>
			</tr>

		<?php endif; ?>

		<tr class="edd_cart_footer_row edd_cart_discount_row" <?php if( ! edd_cart_has_discounts() )  echo ' style="display:none;"'; ?>>
			<?php do_action( 'edd_checkout_table_discount_first' ); ?>
			<th colspan="<?php echo edd_checkout_cart_columns(); ?>" class="edd_cart_discount">
				<?php edd_cart_discounts_html(); ?>
			</th>
			<?php do_action( 'edd_checkout_table_discount_last' ); ?>
		</tr>

		<tr class="edd_cart_footer_row">
			<?php do_action( 'edd_checkout_table_footer_first' ); ?>
			<?php if( edd_get_cart_total() > 0 ): ?>
				<th colspan="<?php echo edd_checkout_cart_columns(); ?>" class="edd_cart_total"><?php _e( 'Total', 'edd' ); ?>: <span class="edd_cart_amount" data-subtotal="<?php echo edd_get_cart_total(); ?>" data-total="<?php echo edd_get_cart_total(); ?>"><?php edd_cart_total(); ?></span></th>
			<?php endif; ?>
			<?php do_action( 'edd_checkout_table_footer_last' ); ?>
		</tr>
	</tfoot>
</table>