LilyPond editor based on JEdit, implemented as a JEdit plugin. It is an edit mode and a feature rich plug-in, which provides tools for making LilyPond scores. Features include instant completion, error report, PDF preview.
DUPS can be used to present any set of images depicting a chronological sequence. It creates a set of HTML pages acting as a browser based picture/pdf viewer. The emphasis lies on displaying two pictures side by side enabling the user to compare them.