Energy Technologies Area at LBNL has a great little web application for improving building energy efficiency. It's called "BETTER" and it's meant to help users "identify the most cost-saving energy efficiency measures in buildings and portfolios using readily available building and energy data."

I was brought on awhile back to help improve the Django-based app, and have been hired again in 2023 to continue improving and updating the code. Watch for a version 2 in early Feb and a version 3 in July!