A free program for Android, by Fortinet.

FortiToken Mobile is a secure and convenient OTP generator for mobile devices. It is an application that generates time-based one-time passwords (OTPs) in a highly secure way, which means that your secrets are safe and accessible only to you. This is possible because your secrets are stored in a secure way, protected by the application itself. The application allows you to create tokens and to install them on your mobile devices. The tokens are stored on your mobile devices and are necessary for the functioning of the application.

This application is the client component of the FortiNet solution. It is a web-based application that generates OTP tokens and it is accessible through a secure portal, from any web browser or mobile device. The solution is highly secure because the web portal is protected by a military-grade encryption.

FortiToken Mobile supports many types of OTPs. The most common type is Time-based OTP (TOTP), but it also supports event-based OTPs. In addition, it supports other types of OTPs, such as Random-number OTPs and others.