The Word Bible Software
Ive been using The Word Bible software program for over a year; it is wonderful and free. It is amazing the number of commentaries, dictionaries, books, maps, etc. that are searchable and integrated – I have over 600 of these all free. This is free but not unprofessional; it is very high quality; it is flexible and you can alter it to suit your needs. I use it almost every day for study.
Starting with the best free Bible software program, e-Sword gives you more than you might expect from a free program, including several free add on Bible versions, dictionaries and commentaries. It's easy to use with tutorials, manuals and training demos all provided for free on the e-Sword Website. A Pocket PC version of e-Sword called Pocket e-Sword is also available for free.
Top ten Bible software packages- free and not free
Some of the products sold by these companies are unbiblical. Most of it is probably ok.
This website has a review of different Bible software.
I know some of these software packages have false doctrine. For example, Logos has false doctrine.