Calvin produced commentaries on most of the books of the Bible. He also wrote many letters and treatises.
Calvin provided many of the foundational documents for reformed churches, including documents on the catechism, the liturgy, and church governance. He also produced several confessions of faith in order to unite the churches.
Psychopannychia
Institutes of the Christian Religion
A Short Treatise on the Lord’s Supper
Commentaries on the Epistles of Paul to the Romans
Treatise on Relics
Commentaries on the Epistles of Paul to the Galatians and the Ephesians
Treatise against Anabaptist Schleitheim Confession
The Secret Providence of God
Commentary on Genesis
Sermons on Deuteronomy
The Letters