Zephyr works brilliantly one handed.
It is literally just like the notification center except opposite. Instead of pulling down from the top, you pull up from the bottom. It's always there. Always responsive. And certainly usable one handed (just like the notification center).
From what I can judge, same is true for SwipePad.
I'm just not a fan of physical buttons. I think we should move away from them.
Zephyr paired with Auxo completely eliminates the need for the home button. Really. The only time you need it is to either wake the device or to undo the jiggly thing when organizing your apps on the home screen, both of which can be accomplished with the power/wake button on top. There is literally no need for a physical home button, in my opinion.
Personally, I find swiping upwards easier than hitting a physical button. Believe it or not, a physical button does require some labor and resistive force. It's by no means tiring to do it, but gesturing is the future. And it's very simple to learn. If people can learn to use the notification center, they can learn to use Zephyr.
I find this response kind of bizarre....lol. But , to each their own. I have played around with swippad and its cool but i find i can do the things i use the most just as easy. So, i added things to a portal i use that arent on my front homepage and a few that are but are bunched in a file.
I have made my most frequent contacts on one of my homepages with their photos so all i have to do is swipe right and there they are so i dont need that addon.
I also like Home Flip as well and have Swippad working from the left and Home Flip working from the right...lol. But you know what, i still have to touch the screen on both...which would be doing some labor