Many different Bible translations

www.esvstudybible.org/online

www.biblegateway.com

Online Parallel Bible Project

www.biblia.com 2011 MacArthur's sermons use this Bible reference popup

The Treasury of Scripture Knowledge

http://www.studylight.org/com/tsk/ (can use Strong's NAS numbers!!)

Online Messages (free)

Discipleship Library
- 2007 Key Mens Conference

Commentaries

David Guzik's Commentaries on the Bible http://www.studylight.org/com/guz/
List of them http://www.studylight.org/com/
Genesis http://www.foundationsforfreedom.net/References/OT/Pentateuch/Genesis/13Isaac/Genesis21-26_Isaac.html

Matthew Henry Condensed

Complete Matthew Henry http://www.ccel.org/ccel/henry/mhc.i.html

Bunch of commentaries http://www.biblestudytools.net/Commentaries/

Blue letter http://cf.blueletterbible.org/commentaries/