Ravelry: Crochet for Knitters - Granny Ripple Blanket pattern by Staci Perry
Boat Blanket/Afghan - Crochet granny ripple with added boats for good measure.
more extreme crochet granny ripple - deeper ripples and colour change - rough chart here too but see other pin on granny ripple technique tutorial
The Granny Ripple Afghan looks like a typical ripple afghan at a first glance. But in reality, this crochet afghan is made much like a granny square. By skipping chains and making clusters, you will achieve this ripple effect.