add additional meta information to the plugin description

<?php
add_filter( 'plugin_row_meta', 'websupporter_row_meta', 10, 2 );
function websupporter_row_meta( $links, $file ){
    if( $file != plugin_basename( __FILE__ ) )
        return $links;

    $links[] = '<a href="http://example.com">Yet another link</a>';
    return $links;
}
?>