access – Page 3 – The unofficial WordPress Plugin Directory

Force login to make the site private – Gozer

Force visitors to log in before accessing your site with extensive exception controls.

Every time than a user log into your website you will receive a simple email notify this.

Allows administrators to limit access to the WordPress dashboard

Protect pages and their subpages with user name/password, and keep protected pages from showing up in menus, search results and page lists.

The complete WordPress user roles plugin for everyone

Frontier Restrict Backend will restrict users from access to the backend (admin area)

Easily create posts and pages visible only for selected users of your blog

MW IP Denied allows you to set access restrictions by IP address for each article.

Protect WordPress website – allow and deny access for certain IP addresses, hostnames, etc.