Christianity

Bible: New Testament (King James Version)
The "Other Bible" (edited by Willis Barnstone) which includes the:
...... Gnostic Gospels, Dead Sea Scrolls, Christian Apocrypha
Daily Readings from Martin Luther's Writings (edited by Barbara Owen)
Practicing the Presence of God (Brother Lawrence)
Summa Theologica (Thomas Aquinas)
Showings (Julian of Norwich)
Imitation of Christ (Thomas a Kempis)
City of God (Augustine) (from the Swift Interactive Bible CD)
Book of Martyrs (Fox) (from the Swift Interactive Bible CD)
Book of Mormon (Joseph Smith) (from the Swift Interactive Bible CD)
Catholic Encyclopedia

Judaism

Bible: Old Testament (King James Version)
The "Other Bible" (edited by Willis Barnstone) which includes the:
...... Gnostic Gospels, Kabbalah, Jewish Apocrypha
New Living Qabalah (Kabbalah) (presented by Will Parfitt)
Kabbalah (Qabalah): Zohar (edited by Gershom Scholem)
Talmud (Mishnah and Gemara) (translated by Alexander Feinsilver)

Buddhism

Theravada: Dhammapada: Path of Dharma (translated by Eknath Easwaran)
Mahayana: Tibetan Book of the Dead (translated by Robert Thurman)

Hinduism

Bhagavad Gita (translated by Eknath Easwaran)
Upanishads (translated by Eknath Easwaran)
Laws of Manu (from the Swift Interactive Bible CD)

Islam and Others

Koran (Qu'ran) (translated by N. J. Dawood)
Adi Granth (Sikhism from World Scripture)

Chinese

Confucianism: Analects of Confucius (translated by Arthur Waley)
Taoism: I Ch'ing: Book of Changes (translated by Brian Browne Walker)
Taoism: Tao Te Ch'ing of Lao Tse (translated by D. C. Lau)
Taoism: Hu Hua Ch'ing of Lao Tse (translated by Brian Walker)

New Age Religions

Eckankar: Shariyat Ki Sugmad (the Eckankar Bible)
Eckankar: Spiritual Laws (adjunct to the Shariyat)
Eckankar: Ancient Wisdom for Today (introductory book)
Eckankar: Spiritual Exercises of ECK (resource for exercises)
Theosophy: Karma (Annie Besant)
Theosophy: Ancient Wisdom (Annie Besant)

Philosophical Texts