Just finished preaching through Judges in 16 sermons and thought I would recommend a few commentaries and resources that I found helpful.
The New American Commentary, Judges, Ruth, Daniel Block, B&H Publishing ****
The NIV Application Commentary, Lawson Younger Jr., Zondervan ***
The Preacher's Commentary, David Jackmann, Thomas Nelson ***
Such Great Salvation, D.R. Davis, Baker *****
Right in their own eyes, George M. Schwab, P&R Publishing *****
Michael LeFebrve http://www.sermonaudio.com/
Carl Truman http://www.cornerstoneopc.com/audio.php