What: Ant Contrib
Why: Use of "ac:" tasks in build, like ac:for
Where: http://sourceforge.net/projects/ant-contrib/files/
How: Install ant-contrib(-*).jar [ANTLIB]

What: ANTLR v3 (complete binaries jar or equivalent)
Why: Translates grammars to Java, provides runtime support
Where: http://www.antlr.org/download.html
How: Copy or link antlr(-*).jar to project lib directory

What: ANTLR v3 task for Ant
Why: Translates grammars from build process
Where: http://www.antlr.org/share/list
How: Install ant-antlr3.jar [ANTLIB]

[ANTLIB] Ant libs are linked/copied to ~/.ant/lib or a system-specific global
location.