Jolly Phonics is a program that teaches phonics. What is great about this program is that it includes motion and songs with each letter.
I love this program! I've used it in my kindergarten classroom, although I know it can be used in preschool as well.
Our local library has Jolly Phonics materials, so if this is something that interests you, look there first. I have found some free resources for the program here:
Another great resource: http://www.starfall.com/
This site includes lots of videos, games, songs, reading passages, etc. I used their workbooks when I taught K. At the time, the workbooks were free. I'm not sure if they are anymore, but they have the passages you can print instead. Just print all of them and make your own workbook!