The Blue Letter Bible provides a ton of resources for every verse in the Bible, accessing multiple translations, cross-references, interlinear readings, Hebrew and Greek lexicons, commentaries, and much more.
The Christian Classics Ethereal Library can be freely accessed through the Internet. All the tens of thousands of books are in the public domain and can be read on-line or copied freely for any purpose. The CCE Library is constantly expanding and very accommodating,
The Bible Gateway is designed to allow helpful reading, listening, studying, searching, and sharing of the Bible in many different versions and translations. Its mission statement is “To honor Jesus Christ by equipping people to read and understand the Bible, wherever they are.” The website is free to use. However, it also offers “Bible Gateway Plus,” a paid membership program with enhanced services.