antlr-runtime.jar
	ANTLR Java runtime, i.e. everything needed to run the ANTLR generated code.

antlr.jar
	ANTLR tool and lang templates to generate code from grammars.

antlr-complete-no-st3.jar
	Same as above PLUS ANTLR Java runtime and String Templates 4.0.8.

antlr-complete.jar
	Same as above PLUS String Templates 3.2.1 and legacy ANTLR 2.2.7 support. 
	Required for grammars with output=template.

gunit.jar
	 Unit testing system for grammars.