Fat Cat Patterns has started another block of the month free pattern called Easter Row x Row. You can also use the various motifs for smaller wall hangings for spring and not just Easter. A new pattern is added each month but if you miss one, you will have to purchase it. Also, check out Sindy's blog here.
You will find more Block of the Month Quilts here.
Claudia's Quilt Shoppe has Block-of-the-Month Projects
Row, Row, Row Your Boat
Block of the Month from Delaware Quilts