CraveZero, developed by the Austrian AEE Institute for Sustainable Technologies, is a tool and process framework designed to optimize energy performance and cost-effectiveness across all stages of building lifecycles. It combines environmental and economic considerations, offering guidelines and an interactive web-based Pinboard to organize information and tools for energy savings.

While accessible online and applicable to new buildings, the Pinboard is still in BETA; the tool is not tailored to historic buildings, and effective use requires significant expertise in energy retrofits and lifecycle assessment.