DragArea
This is an android library project that provides drag and drop operations on top of android-10.
Starting in android-11 (Android 3.0 / Honeycomb) Google provided drag and drop API's of their own. This library is based loosely on those API's and so may be useful to people wishing to develop for Android 2.0 who want an easyish upgrade path.
Documentation is available at http://doffm.github.com/android-dragarea/.
A small example using this library can be found at https://github.com/doffm/android-dragexample.