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.
Lojread is a project designed to aid in the learning of the conlang, lojban. It assists the student in reading the lojban language in such a way that they can build their vocabulary and structural understanding.