RCDevs OpenOTP Server provides two-factor authentication with one-time passwords (OTP). It supports OATH RFC-4226 HOTP (Event-based) and TOTP (Time-based), OCRA (Challenge-based), Mobile-OTP, YubiKey Software/Hardware Tokens, SMSOTP, MailOTP, and OTP lists. It provides a SOAP/XML, RADIUS, and OpenID APIs and integrates into your LDAP (OpenLDAP, Novell, ActiveDirectory). It works with Web applications, VPNs, Linux PAM, Microsoft, and more. It is composed of the RCDevs WebADM server application, the OpenOTP SOAP service, the OpenOTP Radius Bridge, the User Self-service Desk, and Token Self-enrollemnt end-user Web application. VMWare appliances and Web demos are available.