The top three major Bible software companies I use have all released free basic editions of their Bible study tools. They are:
Christians can now enjoy access to the same Bible study tools pastors, professors, and students use, in a free and basic format.
Logos also offers the Free Book of the Month program, as well as makes it simple to find free books at Logos.com and Vyrso.com (the Christian eBook division of Logos) by sorting their entire catalog by price. WORDsearch also offers a collection of Free Books to WORDsearch users, and a free book every Friday on the WORDsearch Blog.
These are some excellent ways to get started studying the Bible, all for free.