Hi Roleigh -
Sure, I can name a couple. The two other windshells that I am most familiar with, and that are most comparable to the Squamish, are the Patagonia Houdini and the GoLite Ether. Both of those have a hood, like the Squamish. The Ether and the Houdini have full zippers, while the Squamish has a deep zipper, but is still a pullover.
The Ether and Houdini are both lighter, about 4 ounces each as opposed to 5 ounces for the Squamish.
As far as my favorites are concerned, it would depend on the trip and conditions. For simple hiking I would probably choose the Houdini because of the full zipper and the lighter weight. But for off trail conditions or climbing, I'd choose the Squamish because of its fabric weight (slightly heavier) and good feature set for those conditions.
Hope that helps.