In eIn this download area, you will be able to download the distribution (binary and source), the Windows installer (for some of the versions) and the documentation for Groovy.
Learn more about Groovy 2.1 in the release notes.
You can have a look at the JIRA release notes.
If you plan on using invokedynamic support, read those notes.
Download zip: Binary Release | Source Release
Download Windows-Installer: Binary Release (Module Versions)
Download documentation: JavaDoc and zipped online documentation
Combined binary / source / documentation bundle: Distribution bundle