This directory contains downloadable versions of Heron and some Heron-apps, like the PreviewApp. Under "older_releases" are older releases of Heron for the sake of history. See the Heron roadmap for details on what is in each release: https://code.google.com/p/geoext-viewer/wiki/Roadmap STABLE Download the file "heron-.zip where version should be something like "1.0.1". UNSTABLE heron-unstable.zip is the current SVN master branch "trunk" version packaged as Heron release Use this only if you have specific requirements or are testing the latest developments.