DARPA AI simulator:<p><a href="http:&#x2F;&#x2F;spectrum.ieee.org&#x2F;automaton&#x2F;robotics&#x2F;robotics-software&#x2F;darpa-robotics-challenge-simulation-software-open-source-robotics-foundation" rel="nofollow">http:&#x2F;&#x2F;spectrum.ieee.org&#x2F;automaton&#x2F;robotics&#x2F;robotics-softwar...</a><p><a href="http:&#x2F;&#x2F;gazebosim.org&#x2F;" rel="nofollow">http:&#x2F;&#x2F;gazebosim.org&#x2F;</a>