The third biennial Community Coordinated Modeling Center (CCMC) workshop was held 11--14 October 2005 in Clearwater, Florida. More than 50 people attended, including members of the space physics research community in academia, government, and industry, as well as operational personnel from U.S. military and civilian organizations responsible for space weather forecasting. These attendees were among those who develop or use space physics models to forecast and mitigate the impacts of space weather on technological systems on the ground and in Earth orbit.