The Climate Change Data Visualizer produces bubble charts that allow users to compare countries over time. These charts can legibly show data values that differ by a ratio of 100,000, and can display hundreds of individual values at once.

The GHG Protocol is the most widely used international accounting tool for project developers to understand, quantify, and manage greenhouse gas emissions. It provides the accounting framework for nearly every GHG standard and program in the world, hundreds of GHG inventories prepared by individual companies, as well as dozens of GHG analysis tools, including specific project-level assessment (both for GHG footprint and potential for emission reductions from project activity), in the following sectors: Adipic Acid, Aluminum, Ammonia, Cement, HCFC-22, Iron and Steel, Lime, Nitric Acid, Pulp and Paper, Refrigeration and Air-conditioning equipment (manufacturing, installation, operation and disposal), Semiconductors, and Wood Products.

The downloadable software, provided free-of-charge, can be used worldwide to evaluate the energy production and savings, costs, emission reductions, financial viability and risk for various types of Renewable-energy and Energy-efficient Technologies (RETs). The software (available in multiple languages) also includes product, project, hydrology and climate databases, a detailed user manual, and a case study based college/university-level training course, including an engineering e-textbook.

The Climate, Community and Biodiversity Alliance (CCBA), together with SOCIALCARBON®, has developed a tool for evaluating the financial feasability of Reduced Emission from Deforestation and Forest Degradation (REDD) projects. This tool is intended to help project developers to design projects that are likely to be financially viable.

This free software suite includes a Windows package for constructing a seasonal climate forecast model, performing model validation, and producing forecasts given updated data.

US EPA has published a GHG calculator in order to assist users in accounting for their GHG emissions.

The Emissions & Generation Resource Integrated Database (eGRID) is a comprehensive inventory of environmental attributes of electric power systems. The preeminent source of air emissions data for the electric power sector, eGRID is based on available plant-specific data for all U.S. electricity generating plants that provide power to the electric grid and report data to the U.S. government.

Quickly assess the carbon footprint of your projects during the investment and operating phases using the Agence Française de Développement (AFD) tool (Excel-based). The calculation can be made with a few basic data for most projects (between 5 and 10) which are entered on a rolldown menu to simplify the task. The evaluation provides initial data on the amount of CO₂-eq emissions from projects and thus makes it possible to analyze, where applicable, possibilities to reduce such emissions (by comparing emissions avoided by the project with a reference scenario as if there had been no project). The tool is available in both French and English.

The Sustainable Energy and Climate Change Initiative (SECCI) and the Structured and Corporate Finance Department (SCF) of the Inter-American Development Bank (IDB) have created the IDB Biofuels Sustainability Scorecard based on the sustainability criteria of the Roundtable on Sustainable Biofuels (RSB). The primary objective of the Scorecard is to encourage higher levels of sustainability in biofuels projects by providing a tool to think through the range of complex issues associated with biofuels. Since the scientific debate around these issues continues to evolve, the Scorecard should be seen as a work-in-progress and will continue to be updated and revised as needed. Comments can be submitted at the end of filling out the Scorecard.

The World Bank Carbon Finance Unit has developed simplified tools to help calculate carbon credits generated by Manure Management projects, Wastewater Treatment projects, Solid Waste Management projects and Landfill Gas Capture Projects.