For a free web site with thousands of resources, try The Blue Letter Bible site on the web. According to the site, their mission is, “to facilitate in-depth study of God’s Word through an on-line interactive reference library continuously updated from the teachings and commentaries of selected pastors and teachers who hold to the conservative, historical Christian faith.” The idea of the Blue Letter Bible is that serious Bible Study ought to start with the Bible. On this site you will find commentaries by John Calvin, Matthew Henry, Charles Spurgeon and John Wesley. In addition, you will find many commentaries by pastors of Calvary Chapel Churches, including: Chuck Smith and Greg Laurie. The site also includes The Treasury of Scripture Knowledge, Six Bible Dictionaries, Strongs Concordance, Greek and Hebrew Text, an Interlinear transliteration and much more. The site is easy to navigate. You’ll find it at www.blueletterbible.org
2ProphetU is an online magazine/website, started by Warren Wiersbe and Michael Catt, to build up the church, seek revival, and encourage pastors.