Open Home has a pay version coming. aHome has a free version, btw
Open Home's themes are already free, the dev... "ported"... them from the themes from xda.
The swipe up or down on Open Home is a bit quicker than aHome's Back or Home button to return to the main screen.
aHome has the Dock, though, which is a large bonus to me
**edit** aHome now autorotates and you can set whichever screen you want as the main screen to go back to.