• Bible Plus

From author's site:

A lightning fast search engine powers the system. Easy to use. Create notes about any chapter. Great for quick and easy searches of the entire Bible (both Old and New Testaments). This is totally free Bible study software ... This free Bible study tool comes without advertising or nags.

It is totally free. Bible Plus is also very quick and easy. Since it's so small you can easily use it in conjunction with more powerful Bible study tools.