...
Download zip: Binary Release | Source Release
Download documentation: JavaDoc and zipped online documentation
Ubuntu packages: see below
You can have a look at the JIRA release notes
...
In addition to the stable and milestone releases you can find intermediate SNAPSHOT releases at the codehaus snapshot maven repository.
Ubuntu Packages
The web page http://freshgroovy.com/groovy/ provides a PPA based Ubuntu package repository. The packages there are updated on a regular base, but not 100% in sync with our releases. New packages are announced on twitter at @FreshGroovy. For instructions on how to use the repository, please visit the website.
Other ways to get Groovy
If you're on MacOS and have MacPorts installed, you can run "sudo port install groovy" to install the latest Groovy release.
...