AMMDI is an open-notebook hypertext writing experiment, authored by Mike Travers aka mtraven. It's a work in progress and some parts are more polished than others. Comments welcome! More.
Another Roam -alike, but within Emacs! It would be a great advantage to me to do everything in Emacs, but I haven't found this really compelling enough to go back. Oh well, they will strip my MIT Hacker Status from me....