At the Department of Energy Renewable and Distributed Systems Integration Peer Review last week, dozens of DoE grant recipients showed the public what they've been doing with our tax dollars. One of the more innovative projects was GridLAB-D, an open-source platform to test new smart grid techniques. This extensible platform will allow people to answer questions such as, how might a new demand response programs change reliability characteristics of the Mid-Atlantic grid. The best part of the program? It's free. You can test it out today.