Is there a plugin that counts posts by author?

I want to have a page listing all the authors and the number of posts each of them has published. Is there a plugin that does this already? Being able to count number of comments as well would be a plus.

Thanks for the help.

I don’t know about a plugin but you can use this:

In author.php you can use this to count posts:

<?php
global $wp_query;
$curauth = $wp_query->get_queried_object();
$post_count = $wpdb->get_var("SELECT COUNT(*) FROM $wpdb->posts WHERE post_author="" . $curauth->ID . "" AND post_type="post" AND post_status="publish"");
?>
<h2>Post Count: <?php echo $post_count; ?></h2>

Inside a Loop you can use this to count posts and comments:

<?php
global $wpdb;
$user_id = $post->post_author;  //change this if not in a std post loop
$where="WHERE comment_approved = 1 AND user_id = " . $user_id ;
$comment_count = $wpdb->get_var(
    "SELECT COUNT( * ) AS total
        FROM {$wpdb->comments}
        {$where}
    ");
$user = get_userdata($user_id);
$post_count = get_usernumposts($user->ID);
echo '<p>User ' . $user->display_name . ' post count is ' . $post_count .', comment count is ' . $comment_count . '</p>';
?>

For All Authors:

<?php
global $wpdb;
$where="WHERE comment_approved = 1 AND user_id <> 0";
$comment_counts = (array) $wpdb->get_results("
        SELECT user_id, COUNT( * ) AS total
        FROM {$wpdb->comments}
        {$where}
        GROUP BY user_id
    ", object);
foreach ( $comment_counts as $count ) {
  $user = get_userdata($count->user_id);
  $post_count = get_usernumposts($user->ID);
  echo '<p>User ' . $user->display_name . ' post count is ' . $post_count .', comment count is ' . $count->total . '</p>';
}
?>