The GO Launcher EX offers a free download, in which you can make in app purchases, and also a paid version as well. Although just a bit more expensive than our first two mentions, you may want to take note of the fact that it has been downloaded and installed more than 100 million times as of this writing.
GO Launcher EX for Android devices is incredibly simple to use, while also having a wide array of options for themes that allow for customization.
While some have stated that it may be a bit overrated, it works very well, is stable and continues to be very popular.