Marine scientists may want to check out Ecopath with Ecosim (EwE), a free, multifaceted ecosystem modeling software suite. EwE offers three components: Ecopath ("a static, mass-balanced snapshot of the system,"), Ecosim ("a time dynamic simulation module for policy exploration,"), and Ecospace ("a spatial and temporal dynamic module primarily designed for exploring impact and placement of protected areas,"). Collectively, the software package allows users to analyze ecological questions, conceptualize policy responses, evaluate ecosystem changes, and much more. The platform offers a global research community, with thousands of users in more than 170 countries, and has contributed to hundreds of publications. In fact, EwE's contributions to marine science were recognized as one of NOAA's "top ten scientific breakthroughs in the last 200 years." Readers can explore some of the platform's research contributions on the User Support tab, which links to "EcoBase: a database of Ecopath with Ecosim models." The latest version of EwE is available on the Downloads tab. Users should note that EwE's desktop software requires Windows Vista or newer.