The DoD’s forward-thinking Darpa group plans to release open-source software that will let anyone design and run virtual tests on their own swimming tank. And more than that, it will kick off the first phase of a contest where you can pit your amphibious tank design against everyone else’s. The prize: $1 million.

Darpa’s software — built in part by researchers at Vanderbilt University — is called Meta. It’s an open source version of the same kind of complex design and simulation software that typically costs big corporations tens or hundreds of thousands of dollars, says Lt. Col. Nathan Wiedenman, the Darpa program manager in charge of the challenge.