Every up-to-date AP (identifi family) can work without controller after first configuration. AP does not need controller to operate. Humans needs controller to configure many APs... There is also way to configure the AP by CLI and editing the config file, but it is not the way you will like. In the past there were APs: 2630 and 2640 and 4102 ... what were true standalone = you can use build-in gui to configure it.
Regards
Zdeněk Pala