Blue Letter Bible is definitely one of my favorite online tools and CCEL does offer many good old commentaries
I saw this was posted on Monergism and I felt it was worthy of sharing with my readers. We live on the shoulders of giants and we benefit from the studies of great men of God who pondered God’s word. Today with the benefit of the internet, we can access many of the best bible study resources available online in electronic format including various bible translations, commentaries, lexicons and plenty of seminary courses and sermons. In the above mentioned post, you will have a mixture of all these fantastic resources for free.
I would encourage Christians to use these resources and many others that are available online. Let’s prepare our hearts for a worthy study of the Word of God in 2015.