One thing he'd like to do is use a program like Torat Emet or Orayta, in order to have a corpus of religious texts on his computer, so that he could look things up and search for keywords in his seforim.
So I'm looking for a piece of software that
- Is a search engine with seforim in it
- Is free, or very cheap
- Works off-line
- Is compatible with Chrome OS
( As far as I could tell, the ones listed here either only work in Windows, or online; neither of which help my friend )