Mechon Mamre
Hebrew English Bible: 2 Samuel
The text of the Book of 2 Samuel, presented side-by-side in Hebrew and English.
Other
Ray Stedman: Adventuring Through the Bible
"Adventuring Through the Bible" is a comprehensive guide to the entire Bible with Bible commentary. This site is an excellent place to start if you are new to the Bible and/or have questions about evangelical Christianity.
Luther Seminary
Bible Tutor: 2 Samuel
This site from The Bible Tutor of Luther Productions provides a good description of 2 Samuel that includes links to famous people in the book of 2 Samuel and links to specific Bible Verses.