We link to these study tools, but implore you to compare what you see, especially at their links, to the Bible itself.
Remember that God's Word is the authority and apply the Berean test. Any teaching you find contrary to scripture is wrong.
Commentaries: Barnes, Clarke, Henry Complete, Henry Concise, Wesley
Concordances: Naves Topical Bible, Thompson Chain Reference
Dictionaries: Easton's Bible Dictionary, King James Dictionary
Lexicons: Hebrew, Greek
PowerPoint "Bible" Maps
See how this site was initially developed and how Sound WAVs were implemented.