This plugin works fine, but, like miunosoft says, i miss some options like description text for slides. By the way, one method to put alt text from slides is adding the follow in the responsiveslider.php
$img_id = get_post_thumbnail_id($post->ID); //to get the id of the attached image
$alt_text = get_post_meta($img_id , '_wp_attachment_image_alt', true); //to get the alt text of the atteched image
<h3 class="slide-alt"><?php echo $alt_text; ?></h3>
I hope this helps.