There are many good online Bible software resources available, but when you need something on a non-web device, you'll want a downloadable program. Depending on the kinds of work you plan to do and the resources you want, there are many options.
The main ones for extensive original language research are Accordance, BibleWorks, and Logos. If you want to get a taste of what the program is like before making a financial commitment, there are free trial versions you can download.
Accordance offers a
Lite version you can try for free. (It's a little hard to find on their site.) It includes the ESV and KJV and some other texts to get you started. Features are
limited, but it gives a good idea of what Accordance can do. Windows or Mac capable.
If you want to see how the full version works,
Accordance offers a 30-day refund option for two packages. (a Starter for $60 and an Original Languages for $100)
BibleWorks is a bit different than the others because you are purchasing a whole package, not a program to which you add various libraries and resources. As such, they cannot offer a free trial version, but
they do have a 30-day return policy.
Logos offers a free
Basic version that includes some very helpful resources. In addition to the KJV, they include their own Lexham English Bible and a number of good resources, most notably, the Faithlife Study Bible notes and the Lexham Bible Dictionary. If you own a previous version of Logos, this is an easy way to update to Logos 7 and keep your resources. For Windows and Mac. Logos does also offer a
30-day return policy.
Though not as oriented toward original language work, two other programs are worth considering.
The Word is one of the first I recommend to people not planning to invest in one of the programs above.
This is a rather full featured program, and it’s free. Includes
Greek / Hebrew. You can always buy some modules, e.g., NRSV, to expand its versatility. Only runs on
Windows or under Mac emulation.
WORDsearch 11 offers a free
Basic version. There are more than enough resources to get you started, and they have a large collection of resources for purchase to expand your work.