geex is my tweaked verion of freex.
Original readme from emacs-freex:
Emacs Geex mode is a minor mode for organizing and editing a massively-hyperlinked database of your notes and ideas. It is the successor to emacs-freex by Per B. Sederberg and Greg Detre. It's a personal wiki on that features transclusion and backing data into SQLite.
For a more detailed description, read the Introduction.
Make sure to read the installation instructions though.
If you learn best by seeing, watch the intro screencast.
If you learn best by doing, then you might want to skip to the Quickstart or Tutorial, and try working through things yourself.
Keywords: emacs personalwiki notes pymacs freex geex wiki database transclusion hypermedia tagging sqlite