How To Display Custom Fields Keys and Values

Hi, this is a code it displays custom taxonomies and its values in a table.It works very fine for me.
Now i want to modify it to display custom fields keys and its values.Kindly help me.

This is code:

function mil(){
  // get post by post id
  $post = get_post( $post->ID );

  // get post type by post
  $post_type = $post->post_type;

  // get post type taxonomies
  $taxonomies= array(
                         "category"=>"Categories: ",
                         "post_tag"=>"Tags: ",
						 "os"=>"OS: ",
                         "platform"=>"Platform: ",
						 "developer"=>"Develepor: ",
                         "publisher"=>"Publisher: "
                  );

  $out = array();
  $out[] = "<table width='100%' border='0' cellspacing='0' cellpadding='0' class='pc-meta'> <tr>
    <td colspan='2'><h2>". $post_type." Information";"</h2></td>
  </tr>";
  foreach ( $taxonomies as $tax => $taxname ){
    // get the terms related to post
    $terms = get_the_terms( $post->ID, $tax);

    if ( !empty( $terms ) ) {

      $out[] = " <tr><td valign='middle'>" . $taxname ."</td>\n<td valign='middle'><ul>";

      foreach ( $terms as $term ) {
        $out[] =
          '  <li><a href="'
        .    get_term_link( $term->slug, $tax ) .'">'
        .    $term->name
        . "</a></li>\n";
      }
      $out[] = "</td></tr>\n";

    }
  }$out[] = "</table>";
  return implode('', $out );
}