CBECC-Com 2.1 was available to download from the developer's website when we last checked. We cannot confirm if there is a free download of this software available. The common filenames for the program's installer are CBECC-Com13.exe, CBECC-Com16.exe or CBECC-Com19.exe etc. We recommend checking the downloaded files with any free antivirus. The program is categorized as Development Tools. The most popular version among the program users is 2.1. The actual developer of the free software is California Energy Commission.
From the developer:
CBECC-Com (California Building Energy Code Compliance) is an open source project that may be used by Code Agencies, Rating Authorities, or Utility Programs in the development of energy codes, standards, or efficiency programs. Architects, engineers, and energy consultants may also use these tools to demonstrate compliance with energy codes or beyond-code programs. The program is capable of generating the standard design model as per the Alternate Compliance Method for a given user model and perform the annual energy analysis comparing its energy efficiency relative to the 2013/2016 Standards.
You may want to check out more software, such as C++ Compiler, Sun Java Toolkit for CDC or MIDletPascal, which might be similar to CBECC-Com.