This is a very impressive and, best of all, completely FREE Bible study resource from Tyndale House, Cambridge called Scripture Tools for Every Person (STEP) which has been in development for some time. The vision is easy access of top quality Bible study tools for pastors, preachers and students of the Bible in the majority world, not just the West.
To see a quick overview with screenshots of what is available go here.
To try out the beta version go to http://www.stepbible.org
It is packed with useful features – to see a quick intro by David Instone-Brewer of Tyndale House watch this;
This is scholarship in service of the church. Wonderful stuff. It also highlights the depth of confidence Christians can have in the Bible text, OT and NT.