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 (translated by Henry Beveridge).
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.