Bob Books - Small, simple back and white pictures, includes phonics and sight words.
Sam Books - Free Printable Books
Starfall Books - Free Printable Books - Worksheets to go with them
Progressive Phonics - Free Printable Books
Early Reading - Free Books with Guides
Fun with Dick and Jane
Dr. Seuss Bright and Early Books - Big books that can be tackled one page at a time.
      Hop on Pop is our favorite
Now I'm Reading!
First Little Readers Parent Pack: Guided Reading Level A: 25 Irresistible Books That Are Just the Right Level for Beginning Readers