Crosswalk
Bible Study tools including on-line commentaries, concordances, and dictionaries. Also includes daily devotional. Resources for conducting word, verse, and topic searches in many Bible versions.

Bible Gateway
A free service for reading and researching Scripture online--all in the language or translation of your choice! Advanced tools to search the Bible by keywords or verse, as well as other tools to enhance your study of the Bible.

BlueLetterBible
One of the oldest and most popular Bible study sites

SearchGodsWord.org
One of the most powerful Bible study sites on the Internet.

Bible Basics - Provides the following information for all books of the Bible:  pronunciation, origins and original language, authorship, significant sections, overview (with linked reference verses).  Also at the bottom of the page is a guide to Biblical Words which presents those difficult Bible words and names with the correct pronunciation.