Wodka is a java application.To run it you need the java virtual machine on your computer. If you have a Mac you are lucky as it is already installed. The others can get it from java.com for free.
You need version 1.4 or higher.
Test it by typing in a commandline window (console) 'java -version'. The result should be something like 'java version 1.5.0_02 Java (TM) 2 RuntimeEnvironment...'
You can start the wodka breeder directly by klicking the following links:
Download the the latest wodka release from the wodka download page .The name is wodka vx.x (e.g. wodka v0.22).
One release consists usually of a single zip file that contains executables, libraries and source code.