Login

These are nice if you need a plugin alternative to some of the techniques in Chapter 5:

Authenticator	3.1.1
Allows only logged-in users to view site content.
http://wordpress.org/extend/plugins/authenticator
Chap Secure Login	3.0.5
SSL-alternative uses the CHAP protocol to hide plaintext passwords during login.
http://wordpress.org/extend/plugins/chap-secure-login
Limit Login Attempts	3.1-RC4
Limit the number of login attempts, by IP, blocking password hackers.
http://wordpress.org/extend/plugins/limit-login-attempts
Member Access	3.0.5
Require that users be logged in in order to view certain posts and pages.
http://wordpress.org/extend/plugins/member-access
One-Time Password	3.1.1
Login from untrusted locations using a password that’s valid for one session only.
http://wordpress.org/extend/plugins/one-time-password
Restricted Site Access	3.1.1
Limit or redirect access to visitors with a variety of handling options.
http://wordpress.org/extend/plugins/restricted-site-access
Semisecure Login Reimagined	3.1.1
Another SSL alternative that uses public and secret key authentication.
http://wordpress.org/extend/plugins/semisecure-login-reimagined
Stealth Login	2.7.1 (tests fine with 3.1.1)
Create custom URLs for logging in, logging out, and registering for your site.
http://wordpress.org/extend/plugins/stealth-login