The Nine Ways of Prayer of St. Dominic - Many of these famous "ways" of prayer have to do with posture, using our bodies in prayer. - http://www.domcentral.org/trad/domdocs/0005.htm
Between the Clouds - This (31 Day / Complimentary) "Rudder" attempts to weave the Christian contemplative tradition seamlessly with developmental psychology, anthropology and physics. - http://www.contemplativerudder.com
The Spiritual Exercises of St. Ignatius of Loyola - A classic. The Ignatian method of prayer uses visual imagination to draw nearer to God. Intended for spiritual directors or retreat masters, but "directees" can benefit from this book as well. - http://www.ccel.org/ccel/ignatius/exercises.html
Daily Virtual Retreat - One-way (read only) electronic mailing list. With different themes for each month. Short Scripture quotes and comments provide food for further meditation for each day. - http://ihrc.net/retreat.htm
Invisible Monastery - International, multilingual online group of Catholics who believe in the power of prayer, and who commit to praying weekly for each other's special intentions. - http://digilander.libero.it/monast/inglese/index.htm
A Cry of Love - A meditation on the Passion, told in the first person. - http://digilander.libero.it/rexur/inglese/index.htm
Awaken to Prayer: How to Pray As a Catholic - Includes history and practical advice. Draws on the riches of (Eastern) Orthodox as well as (Western) Catholic spirituality. - http://landru.i-link-2.net/shnyves/prayer.html
Pray with the Heart - Litanies, novenas, the Way of the Cross, and other Catholic prayers. - http://prayers.pray-with-the-heart.org/
Busted Halo - Sponsored by the Paulists and written by young adults for young adults. Includes discussion boards on various topics, a Flash trivia quiz, guides for seekers. - http://www.bustedhalo.com/index2.htm
Online Ministries - Includes daily reflections on readings for Mass, an online retreat, tips for praying, and Stations of the Cross. Based on Jesuit spirituality. From Creighton University. - http://www.creighton.edu/CollaborativeMinistry/online.html