Christian

This plugin is designed to remind WordPress users to reset their password after certain number of days.

Force Password Reset

I wasn't clear if it would, but this plugin seems to force an immediate password reset. I chose a 1-day interval (since 0 wasn't a valid option), expecting passwords to be force-changed tomorrow, but the plugin immediately prompted me to change my password. That's what I wanted, so I liked it. Otherwise, that could come as a surprise to some people.

Thank you.

Definitely forces a reset

This plugin is designed to remind WordPress users to reset their password after certain number of days.

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.

Force Password Reset vs Disable Password Reset