Bibles
There are a lot of great Bible software programs out there, that allow you to cross reference verses, read commentaries, investigate the original languages, read multiple translations, etc. I recommend Online Bible because it is powerful and free (if you want a copyrighted translation you have to pay for those because Online Bible has to pay the copyright holder, but there are many fine free versions available.) Note there are different websites, but I would suggest going to all of them as I have occasionally found different free downloads at them (even though it is one cooperative, that doesn't mean they are all consistent on updating their site). It is available for a variety of platforms, including Windows and Mac.
Christian Games
I echo the words of Paul when he said that he became all things to all men so that he might win some to Christ. This is how I view Christian games. I know my kids have grown a lot by playing them. They are not digital babysitters, but are great ways to interact with your kids and scripture. Below are some of my favorites, I am reviewing the "Tomb of Moses" and "Timothy and Titus" right now.