PHP strong authentication library, web interface & CLI, OATH certified
...multiOTP supports hardware and software tokens with different One-Time Password algorithms like OATH/HOTP, OATH/TOTP and mOTP (Mobile-OTP). QRcode generation is also embedded in order to support provisioning of Google Authenticator software tokens. SMS code sending is currently implemented for several providers (ASPSMS, Clickatell and IntelliSMS).
The data storage of the command line utility is by default flat files based in order to simplify deployment in a few minutes, but MySQL backend is supported too.
multiOTP can be easily integrated in RADIUS servers like FreeRADIUS under Linux/Windows or TekRADIUS LT under Windows.
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Asimba is an application for managing access, supporting multiple identity provider protocols, like SAML and A-Select, as well as authentication methods, like LDAP, Radius but also One Time Password/SMS and PKI.
Built as J2EE application, it provides a modular framework that can be integrated in many IT systems as access component.
SMSec is a free , open source, GPLed implementation of two-factor authentication via SMS (Short Message Service). It uses SMSD to "talk" to GSM modems, provides a flexible XMLRPC web-service for web-developers integrate SMSec into their web-apps.
Directory Manager is a tool for managing LDAP directory data. It includes a schema independant editor, a schema viewer and some pretty Views of the data. (And an easy way to create your own custom views). Directory Manager requires an LDAP v3 server.