These drops contain the SWT libraries and source for standalone SWT application development. For examples of standalone SWT applications refer to the snippets section of the SWT Component page.
To run a standalone SWT application, add the swt jar(s) to the classpath and add the directory/folder for the SWT JNI library to the java.library.path. For example, if you extract the download below to C:\SWT you would launch the HelloWorld application with the following command:
java -classpath C:\SWT\swt.jar;C:\MyApp\helloworld.jar -Djava.library.path=C:\SWT