Here is a list of all documented namespaces with brief descriptions:

[detail level 12]

Sacado
CacheFad	Namespace for forward-mode AD classes w/caching
ELRCacheFad	Namespace for expression-level reverse forward-mode AD classes
ELRFad	Namespace for expression-level reverse forward-mode AD classes
Fad	Namespace for forward-mode AD classes
LFad	Namespace for logical forward-mode AD classes
Rad	Specialization of Promote to ADvar types
Rad2	Specialization of Promote to ADvar types
RadVec	Specialization of Promote to ADvar types
Tay	Namespace for Taylor polynomial AD classes