Jeff Orkin's GOAP page, tons of resources on GOAP. http://alumni.media.mit.edu/~jorkin/goap.html http://alumni.media.mit.edu/~jorkin/goap.html https://github.

Jeff Orkin's GOAP page, tons of resources on GOAP. http://alumni.media.mit.edu/~jorkin/goap.html http://alumni.media.mit.edu/~jorkin/goap.html https://github.com/stolk/GPGOAP https://github.com/stolk/GPGOAP has an implementation of goap in C, the code is really clear and easy to understand.