Nave's Topical Bible, by Orville J. Nave, A.M., D.D., LL.D. Nave began this masterpiece while he was serving as an army chaplain. It contains over 20,000 topics and sub-topics, covering 100,000 scripture references.
Reverend R.A. Torrey is perhaps most well known for his topical concordance, a guide for Christians on all varieties of life issues. It also contains over 20,000 topics and over 50,000 Scripture references.
The Biblos Team has worked hard to supplement these classic works with over 3600 contemporary topics. This topic list was greatly aided by the excellent list of topics at OpenBible.info. The Biblos topics are labeled as "Topical Bible Verses" and carry a Creative Commons Attribution License.