Architects and engineers often are looking for information on sustainable building materials, tools to evaluate the life-cycle environmental impact and tools to obtain a green building rating. An article in November 2004 provided an overview of the green building rating systems and discussed the various aspects of sustainable design. This article provides the desktop information sources and software tools available to help designers throughout the design process. Examples of knowledge bases for sustainable design technologies, software tools for feasibility study and performance evaluation, and green building rating tools are presented.