The location of every identifiable place mentioned in the Bible.
Find out which class or Sunday teaching references a particular scripture.
The "Concordant Version of the Old Testament" and the "Concordant Literal Version of the New Testament". Some in on-line format, some in pdf.
Find out how to pronounce those Greek or Hebrew words you've found in your scripture research. The Way international is standardizing on the pronunciations given on biblestudytools.com.
The "Figures of Speech used in the Bible" by E. W. Bullinger with an on-line searchable index.
A downloadable pdf version:
How to do a word study. - STS-3047 One Heart and One Soul