One piece of software required for this book is JDK, which you can get from http://www.oracle.com/technetwork/java/javase/downloads/index.html. JDK is necessary to run and develop on the Java platform.

The other major piece of software that you'll need is Leiningen 2, which you can download and install from https://github.com/technomancy/leiningen. Leiningen 2 is a tool that is used to manage Clojure projects and their dependencies. It's quickly becoming the de facto standard project tool in the Clojure community.

Throughout this book, we'll use a number of other Clojure and Java libraries, including Clojure itself. Leiningen will take care of downloading these for us as and when we need them.

You'll also need a text editor or Integrated Development Environment (IDE). If you already have a text editor that you like, you can probably use it. Refer to http://dev.clojure.org/display/doc/Getting+Started for tips and plugins to use your particular favorite environment. If you don't have a preference, I'd suggest that you look at using Eclipse with Counterclockwise. There are instructions to get this setup at http://dev.clojure.org/display/doc/Getting+Started+with+Eclipse+and+Counterclockwise.