AXI3 initiator and target Bus Functional Models. These were done to replace Xilinx AXI VIP which required a license but they no longer do. So if you're doing XILINX FPGA work, it might be a good idea to use them. At this point I don't mean to maintain these any longer but let me know if you have a need. http://blog.dspia.com/2015/08/05/open-source-axi3-bus-functional-model-bfm/