Feed Key
Perfect Paper Passwords
Shared Users Reloaded
CAS Maestro
SN Extend Authentication
JSON API User
LaunchKey
Socialauth-WordPress
Login Required
Ads Manager WP/BB
IP Based Login
Simple LDAP Authentication
Plugin Name: Ldap_login_password_and_rol...
Lil'Omi Avatars
WP Vanilla Connect
WPMU Ldap Authentication
HTTP Authentication
Gigya Toolbar – Increase Traffic A...
Sexy Login
WordPress 2-step Verification
Keyring
Block-Spam-By-Math
Root Cookie
Shibboleth
Yubikey-plugin
One-Time Password
No Disposable Email
External DB Authentication