Embedthis Expansive is a fast and flexible static web site generator using Ejscript. It quickly creates HTML pages from layouts, partials and content pages.
yuck is a command line option parser for C that works on a minimal set of dependencies---only a C compiler and the m4 macro processor are required. It supports all the standard use cases: GNU-style long options (--option), condensable short options (-xab for -x -a -b), and optional arguments to long and short options (--foo[=BAR]), multiple occurrence of options (-vvv). Most importantly, it does not depend on libc's getopt() nor getopt_long().
Couscous is a static documentation generator implemented in PHP. It supports MarkDown Extra, and requires a YAML configuration file, but then autodiscovers and assembles any *.md files, generate a template- enriched manual, and save or upload it (optionally in a gh-pages branch).