Loyola Press is a Jesuit ministry which provides this service.

3-Minute Retreats invite you to take a short online prayer break right at your computer and to spend some quiet time reflecting on a Scripture passage.  As  everyone does not pray at the same pace, you have control over the pace of the retreat.  After each screen, a Continue button will appear.  Click it when you are ready to move on.  If you are new to online prayer, the basic timing of the screens will guide you through the experience.