You can grab a single JAR containing all of Brooklyn and its dependencies here:
Just download your preferred flavour and add it to your classpath.
You can checkout examples from github.com/brooklyncentral/brooklyn-examples, build them with maven (v3), and then run them with the demo*.sh scripts in the examples. This will take care of downloading Brooklyn and the dependencies.
A good entry point is the Simple Web Cluster.
If you use maven, you can add Brooklyn with the following entries in your pom:
{% highlight xml %} cloudsoft-releases http://developers.cloudsoftcorp.com/download/maven2/ libs-snapshot-local http://ccweb.cloudsoftcorp.com/maven/libs-snapshot-local/ true never fail
<dependencies>
<dependency>
<groupId>io.brooklyn</groupId>
<artifactId>brooklyn-all</artifactId>
<version>${project.version}</version>
</dependency>
</dependencies>
{% endhighlight %}
Brooklyn-All (used above) brings in all dependencies, including jclouds and Apache Whirr. If you prefer a smaller repo you might want just brooklyn-core, brooklyn-policies, and some of brooklyn-{software-{webapp,database,messaging},systems-hadoop}. (Browse the full list here.)
TODO: we are moving to mavencentral so the repositories section will shortly be unnecessary
Full source is at github.com/brooklyncentral/brooklyn. Information on working with the source is [here]({{ site.url }}/dev/code).
Alternatively you can download archives of the source directly: