- ESV.org has a really good (and affordable) subscription plan that gives access to all of their commentaries
- CCEL has all of Calvin's commentaries and one of the version of the Institutes available. It's rare that I don't reference his commentaries during sermon prep and they're quite devotional as well.
- Ligonier.org has been my main go-to resource for years and years now.
I also make use of my pastor's personal library (one of the perks of being an apprentice to a pastor with a lifetime of ministry experience is access to his books) and the library at the Cornhill Training Course.
I use a few:
- ESV.org has a really good (and affordable) subscription plan that gives access to all of their commentaries
- CCEL has all of Calvin's commentaries and one of the version of the Institutes available. It's rare that I don't reference his commentaries during sermon prep and they're quite devotional as well.
- Ligonier.org has been my main go-to resource for years and years now.
I also make use of my pastor's personal library (one of the perks of being an apprentice to a pastor with a lifetime of ministry experience is access to his books) and the library at the Cornhill Training Course.
CCEL?
Whoops! Here’s CCEL, it’s the Christian Classics Ethereal Library https://ccel.org/
+1 on CCEL
They've also got the Schaff Church Fathers and most (if not all) of Thomas Aquinas.