Imagine carrying this in your shirt pocket:
*a Hebrew Bible & concordance
*a Greek New Testament with concordance
*several bible translations/languages with their concordances
*several commentaries
*ancient versions like latin & syriac
The Palm Bible+ is an open-source Bible program for handheld computers. It's free and does not require registration.
Many public domain translations are readily available at no cost. It is also possible, with some effort, to convert translations which you have purchased through other programs.