RE: conversational chatbot for a real robot.
Bot Libre supports standard AIML 2. Pandorabots has some AIML extensions that are not supported.
But the ALICE and Rosie AIML scripts work with Bot Libre,
There are bot templates for both of these.
For AIML see,
Bot Libre also supports response lists, Self scripting, and Regular Expressions,
If you are trying to create the "most intelligent conversational bot" I would not recommend AIML, but instead recommend using response lists and Self scripting.