E-Sword Bible Program

E-Sword is the very best computer Bible program that I know of and the basic program is FREE 
with many, many add-on programs (commentaries, dictionaries, etc.) that are also free. 
It has all kinds of search tools, copy, notes, and options.
Go to E-Sword for the introductory information. 
To download the basic program go to downloads.
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Once you run the basic program you may return to the web site and download 
additional versions of the Bible (only the ones marked $ are not free). 
You need to close the basic program before adding any add-ons.

I recommend the following add-on programs that just plug into the basic program: 
Bibles
King James Version or King James Version (Red Letter)
Commentaries
Keil & Delitzsch Commentary on the Old Testament, 
Robertson's Word Pictures in the New Testament,
John Gill's Exposition of the Entire Bible,
Jamieson, Fausset and Brown Commentary,
Adam Clarke's Commentary on the Bible,
Treasury of Scripture Knowledge (great cross references),
King James Concordance.
Dictionaries
Noah Webster's Dictionary of American English