What do you use?
I use
E-Sword. It's free, convenient, and I can access everything in one program on my computer. I have a concordance, Webster's 1828 dictionary, some commentaries (Matthew Henry, Treasury of David by CH Spurgeon), maps and timelines. I can type up notes as well right there on e-sword instead of bringing up like MS Word.
You can get various translations, all these different things, but some you have to pay for.
It's great and easy.
If you have any questions on how to do something in e-sword just ask.