ListBuilder is an evolutionary enhancement of TwinColSelect (and is more or less based on it). I have myself needed this kind of component in a few client projects so I decided to write it under the Apache 2.0 license so others may use it too. Main enhancements: • Item order preserved! • Prettier buttons (with icons). • Button state is updated based on what is selected. • Fixes a few bugs from TwinColSelect which may result into simultaneously selected rows in both columns. • Allow adding style names to left and right column captions. Drawbacks: • You need to use the getOrderedValue() method to fetch the selected items in correct order; getValue() will return the selections as a Set similarly to TwinColSelect.