FoldingCell is an open source component from RAMotion providing a custom UITableViewCell that neatly expands to show another container view.
FoldingCell cell’s expand with a neat unfolding animation, and the foreground cell view, and the container view are both set up within interface builder.
You can find Folding-Cell on Github here.
There is also a Java based Android component that can be found on Github here.
A great component for adding an elegant animation to expanding table view cells.