Jess

A simple plugin that allows you to restrict access to certain pages on your website to only logged in users quickly and easily. This plugin can be useful to those who do not need overly complicated membership systems, and to those who want to password protect a group of pages but don’t want to password protect each page individually, forcing the users to log into each one.
It is simple to use. First select whether you want to password protect all pages by default, and want to choose which pages are public. Or choose to allow all pages to be public by default, and choose which pages are password protected.
When non-logged in users try to access a password protected page they will be redirected to the WordPress login screen. Once logged in, they will be redirected back to the requested page and will not be asked to log in again on subsequent pages.

Password Protect Pages

Restrict access to specific pages to only logged in users.

Simon

Lemonberry Page protect is a free, open source plugin for WordPress to provide a simple method of restricting access to a group of (non-Wordpress) users. It’s intended use is for club member sites etc where you want to keep some information/forms restricted.
Multiple groups can be defined and re-used of multiple pages. The user controls allow change of password.
The administration page allows passwords to be changed, users to be added and groups to be defined.
The excerpt of a post is not blocked.
Note: This plugin will not currently work with all themes, and you’ll get a message after login to show this. We’re working on a solution to make it work with all themes which should be available soon.

Lemonberry Page Protect

Lemonberry Page Protect is a simple way to restict page/post content to a list of (non-Wordpress) users.

Password Protect Pages vs Lemonberry Page Protect