Online Bible http://www.esvbible.org/ you can even have the Bible read to you!
Daily Devotions – Subscribe to Portals of Prayer at http://sites.cph.org/portals/
Luther’s Small Catechism http://catechism.cph.org/ – great for studying and recalling the great words of “what does this mean?” The Small Catechism contains the 6 chief parts of faith – 10 Commandments, The Creed, The Lord’s Prayer, The Sacrament of Holy Baptism, The Office of the Keys, The Sacrament of the Altar. Martin Luther concisely explains these important portions in a way for the head of the household to teach the home.
The Book of Concord contain writings by Martin Luther and othe prominate Lutheran scholars. We believe, teach and confess that the Book of Concord is a correct interpretation of Holy Scripture. Therefore it is a valuable resource in understanding the doctrines of the church. It is available online at http://www.bookofconcord.org/
One of the great books of Lutheranism is C.F.W. Walther’s The Proper Distinction of Law and Gospel. Walther, the first president of the LCMS and first president of the Concordia Seminary in St. Louis, MO lectured students on Friday evenings. Pastor Mark Werner has a couple of copies you can borrow or you can find it online at http://www.lutherantheology.com/uploads/works/walther/LG/.