Jon Christopher

It’s insecure to send user account passwords via email, so use this plugin to issue a password reset instead.

New User Password Reset

Automatically issue a password reset when creating new Users

Dugonja

This plugin will enhance security of your WordPress site by disabling password reset function over email of WordPress. 
Use with caution since otherwise if you forgot your user password you will need to reset the password directly in the database with phpmyadmin or similar tool. 
Adittionally this plugin will hide notice which say what is wrong “password” or “username” on WordPress login page.

Disable Password Reset

Enhance security of your blogs by preventing password reset over email function.

New User Password Reset vs Disable Password Reset