I’ve seen specialized Android UI libraries like for charting, but none for alternate implementations of controls and containers. Are there any?
I saw http://code.google.com/p/android-misc-widgets/ mentioned recently on another SO question. I haven’t looked at it or used it myself, but it appears to be the kind of thing you’re looking for.
Yes, there is. DroidUX is a professional UI/UX component library for the Android platform. It contains reusable widgets that are fast and easy to use in your project, such as ActionBars, Dashboard, QuickActions, GalleryFlow, Editors, Wheel widgets, and other type of widgets.
Using the DroidUX widgets in your project is no different than the stock widgets. You can even use some of the DroidUX widgets as drop-in replacement for the stock widgets.
Check it out here: http://www.droidux.com