The Psalms of David - E-text at Project Gutenberg also containing Johnson's Life of Watts, and extracts from Watts' preface. - http://gutenberg.org/etext/13166
Isaac Watts Celebration - Biographical devotional by Jean Silvan Evans. - http://www.urc.org.uk/documents/isaac_watts/watts_index.htm
Indelible Grace Music: Isaac Watts - Features the preface to "Hymns and Spiritual Songs", several hymn texts. - http://igracemusic.com/igracemusic/hymnbook/authors/isaac_watts.html
American Presbyterian Church: Isaac Watts - Several articles criticizing his theology and his rejection of exclusive psalmody. - http://www.americanpresbyterianchurch.org/isaac_watts.htm
Smith Creek Music: Isaac Watts - Illustrated biographical article with literary analysis. - http://www.smithcreekmusic.com/Hymnology/Watts/Isaac.Watts.html
Giga Quote: Isaac Watts - Quotations from poetry and prose works. - http://www.giga-usa.com/gigaweb1/quotes2/quautwattsisaacx001.htm
Isaac Watts - Biographical sermon by Victor Shepherd. - http://www.victorshepherd.on.ca/Sermons/isaac.htm
Isaac Watts, Senior - A letter written by the hymnwriter's father to his children. - http://www.wholesomewords.org/family/wattstochld.html
Isaac Watts, Solemn Address to the Deity - Meditations on trinitarian doctrine: electronic text with interspersed commentary by Robert A. Sabin - http://www.whoisjesus.com/watts.html
Isaac Watts, Hymn-writer - Biographical information; several hymn texts (compiled by James Kiefer) - http://justus.anglican.org/resources/bio/70.html
Christian Classics Ethereal Hymnary: Isaac Watts - [hymnals; 600+ hymns and poems] Includes etexts of "Psalms and Hymns" and "Divine and Moral Songs", critical essays by Bernard Manning, and brief biographical article. - http://ccel.org/w/watts/