Amit Verma

Comment Author count adds total number of comments posted by the comment authors in the end of comments. It omits comment count for the Post author.
It helps to display comment authors activity on you blog, which might also increase the click through rate of comment author’s link.

Comment Author count

Comment Author count adds total number of comments posted by the comment authors.

Corey Salzano

This plugin removes all hyperlinks from comment author user names. Commenters can provide a home page (or any) URL along with their comment on a lot of themes. This plugin will strip all links from commenter names wherever they may appear throughout your site’s theme.

Disable Comment Author Links

Prevents comment author names from linking to external websites.

Comment Author count vs Disable Comment Author Links