There are several Bible study resources available online for free, but one just became available in May. I have distributed the free program, e-Sword, to many people. And now it is free online as well, called e-Sword Live!
It’s the same basic layout and public domain resources, but it’s no longer limited to PCs. Now you can run it on any computer, anytime you have an internet connection.
Here are some other places online that can help you study your Bible: