The U.S. Department of Energy maintains on their website a fairly comprehensive directory of building energy software tools. From their website: “The energy tools listed in this directory include databases, spreadsheets, component and systems analyses, and whole-building energy performance simulation programs. A short description is provided for each tool along with other information including expertise required, users, audience, input, output, computer platforms, programming language, strengths, weaknesses, technical contact, and availability.” The directory can be found here
and includes, at the time of writing, information on 301 different software packages.