Please find here the first version of the Energy Toolkit, a collection of leading instruments and methodologies for low-emission, climate-resilient development planning in the energy sector. The goal is to offer energy practitioners, policymakers, and experts a quick reference guide for well-established low-emissions development strategies planning tools that are available at no or low cost. The result is a compilation of tools from different originations and agencies around the world. Produced as a team effort with the many members of the Low-Emissions Development Strategies Global Partnership (LEDS GP), and in particular its Energy Working Group (LEDS EWG), the Worldwatch Institute cooperated with the working group’s regional co-chairs to select and compile the tools presented in the Energy Toolkit.