Can someone please explain the major differences between IBM Tivoli Access Manager and Tivoli Federated Identity Manager? Does TAM support SAML?
I will elaborate a bit more since nzpcmad 's answer fails to address TFIM at all.
IBM Tivoli Access Manager ( now IBM Security Access Manager) handles the authentication and authorization part of your IAM infastructure.
IBM Tivoli Federated Identity Manager allows for federated and web Single Sign On. It can be used with ISAM, for example in a scenario that ISAM delegates the authentication part to TFIM for certain resources/cases.
ISAM does not speak SAML by itself, but it can leverage TFIM that does.
Other than that, you would have to ask something more specific in order to get concrete answers.