7 links
Cain and Abel
jrf.org
The Genesis passage regarding the two brothers, in Hebrew with an English translation.
Catholic Encyclopedia: Cain
newadvent.org
Commentary on the Biblical killer from the traditional Catholic perspective.
Comparative Index to Islam: Cain and Abel
answering-islam.org
Discusses Islamic beliefs about the two brothers, including the folk tradition that they fought over women.
Jewish Virtual Library: Cain
jewishvirtuallibrary.org
Brief profile of the Biblical killer, with links to pertinent Torah passages.
The Secret of Happiness and Other Insights from Cain and Abel
aish.com
Analysis of the first murder based on the Jewish Talmud.