The AI Foundation and our community has three open source free software "products"
A fourth category, related to (2), are tools and add-ons that enhance the quality of the AIML interpreters.
old, unsupported, but still fascinating implementations of the Alicebot and AIML technologies. Please let us know if there is an Alicebot or AIML technology not listed here.
People are free to develop AIML interpreters and content under any license they wish, including proprietary ones. There are many free open source products listed here. But, obviously, there are also projects like Pandorabots that are non-free, non-GNU implementations of AIML and that's cool too.
You may also want to look at the AIML projects in the Bot Industry Survey.
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