Calvin's Commentaries: The complete commentaries of John Calvin online.
Christian Classics Ethereal Library: John Calvin: Includes biographical information, texts of commentaries, sermons, Institutes, "On Prayer", and "On the Christian Life".
Consensus Tigurinus: Document written by Calvin and Bullinger on the sacraments.
Institutes of the Christian Religion: E-text as translated by Henry Beveridge.
Of Prayer: Subtitled "A Perpetual exercise of Faith. The Daily Benefits Derived From It."
On Hundred Aphorisms: A list of concise statements taken from Calvin's Institutes.
On the Christian Life: Translation by Henry Beveridge
Preface to the Genevan Psalter, 1565: Discussion of music and singing in the church liturgy.
Short Treatise on the Lord's Supper: John Calvin's treatise on the Lord's Supper and its true institution, benefit, and utility.
The French Confession of Faith: Calvin's statement of faith of 1559.
The Geneva Catechism: A catechism or a little "Confession of Faith" published by Calvin in Geneva in 1536.
The Necessity of Reforming the Church (1543): An English translation of the complete text.
Treatises on Predestination: Text of English translation by Henry Cole.