Helium Foot Software gives away HFUIKit for free. Anyone is free to use this code in their iPhone projects. This code is released under the very permissive BSD license. Although not required, we'd still love to you if you use it. Unfortunately, we can't provide any support for HFUIKit.
You can get HFUIKit from bitbucket at http://bitbucket.org/kalperin/hfuikit/.