Jewish Encyclopedia: Habakkuk 
Overview of the prophet from the traditional Jewish perspective, including rabbinic commentary.
http://www.jewishencyclopedia.com/view.jsp?artid=7&letter=HCatholic Encyclopedia: Habacuc (Habakkuk)
Commentary on the Biblical prophet from the traditional Catholic perspective.
http://www.newadvent.org/cathen/07097a.htm
Habakkuk
Profile of the prophet from a joint Lutheran and Catholic bible study project.
http://www.aboutbibleprophecy.com/p17.htm
Book of Chabakuk
The text of the Biblical chapters in Hebrew and English.
http://www.hareidi.org/bible/Habakkuk.htm
The Prophet Habakkuk
Rabbinic traditions about the prophet, including his apocryphal interactions with Daniel in the lions' den.
http://www.chabadonline.com/shavuot/shavuot-article-page.asp?ArticleID=2054
The Minor Prophets: Habakkuk
Historical and spiritual overview of the Biblical prophet.
http://www.zianet.com/maxey/Proph7.htm
