AIEngine is a packet inspection engine with capabilities of learning without any human intervention. It helps network/security professionals to identify traffic and develop signatures for use them on NIDS, Firewalls, Traffic classifiers and so on.
You can download it from the following link: https://packetstormsecurity.com/files/download/143878/aiengine-1.8.1.tar.gz
Source: https://packetstormsecurity.com/files/143878/AIEngine-1.8.1.html