Autotoolset is both a colection of small tools (scripts, emacs macros, etc.) to simplify project development with autoconf/automake/libtool/texinfo/emacs and a good documentation on how to get started on these tools and the whole GNU software model.
A zope product which provides an interface to keep track of product updates which need to be run on zope sites through an interface that keeps track of those that have been run, when, by who, and their outcome.
A File System Folder behaves just like a normal Zope Folder, except it can export its contents to individual human-readable text files in the file system, and then re-import those same files, enabling (for example) proper version control.