John Foldager took the time to look at the controls I posted about back in September and has some great input:
I have looked at some of the controls and they seem to require some “clean up” in the code as well as their behaviour.
An example is the GanttChart component which has some methods that are misspelled (minor refactor would fix this) and the scrollbars doesn't work perfectly according to your scrolling in the view.
I personally don't think that these components should be packaged with the core Notes client as long as they are not an official “part of the core SWT/JFace/…”. We as developers can use the components if we like and that is great.