You do not need an extra script, all can be done with TWiki's built-in TWikiForms and FormattedSearch features. I do not know of an existing TWiki application for a library, a place to start is ItemToDo and ChangeRequest.
-- PeterThoeny - 26 Oct 2003
Look also in TWikiApplication, which lists existing applications, some of which are similar
to what you want to do (my Task list one, for instance)
-- ColasNahaboo - 05 Jan 2004