The small hand-held gardening tool called a crowsfoot is usually constructed from a wooden handle attached to a metallic claw, which looks very much like the foot of a crow. Gardeners use these to turn up soil in preparation for planting.
A cultipacker is a large tool for farming, not home gardening. The central piece is a long metal rod with metallic wheels arranged along its length, able to roll along the ground. It's attached to another piece of metal that can be hitched to a tractor or other vehicle. The wheels are free to turn as the cultipacker is dragged over the ground. As the wheels turn, metallic teeth break up the soil.
The wheels on a crowfoot cultipacker leave crow-foot shaped impressions on the soil as they are dragged over it. This is suitable for preparing the soil for a number of crops, including wheat and alfalfa. The use of a cultipacker can prepare a large area for planting in a short period of time.
Farmers might also use a cultipacker for other purposes than creating seed holes. In that case they wouldn't want to use a crowfoot cultipacker. A V-cog cultipacker looks similar, but instead of leaving small holes in the ground into which seeds are to be planted, this is used to flatten and settle the ground.