RCDevs OpenOTP provides strong two-factor authentication with one time passwords (OTP)

RCDevs OpenOTP provides strong two-factor authentication with one time passwords (OTP). It supports OATH RFC-4226 HOTP (counter-based) and TOTP (Time-based), Mobile-OTP, YubiKey Software/Hardware Tokens, SMSOTP, and MAILOTP. It provides a SOAP/XML and RADIUS API and integrates into your LDAP (OpenLDAP, Novell, ActiveDirectory). It works with Web applications, VPNs, Unix, Microsoft, and more. It is composed of the RCDevs WebADM server application, the OpenOTP SOAP service, the optional Radius Bridge, and the User Self-service Desk end-user Web application. VMWare appliances and Web demos are available.

• Licenses : Freeware
• Operating Systems : Unix, Linux
• Implementation : C, PHP

OpenOTP is an implementation of the HOTP protocol using a ZeitControl Cardsystems ZC3.9 BasicCard and standalone balance reader, standalone Spyrus PAR2 (Personal Access Reader), or PCSC-Lite supported smart card reader. Included is a C library implementation of the HOTP protocol and associated user database management, HOTP PAM library, OpenVPN plug-in module, micro RADIUS server with HOTP support, and utilities for managing the smart card, Spyrus reader, and host side HOTP user database. The PCSC-Lite API provides reader support for smart card management.

• Licenses : BSD
• Operating Systems : Linux, FreeBSD, Mac OS X
• Implementation : C