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.
The block-programming designs started here also made their way into the BioBike VPL, Enflame, and Vaguely. The source is on Github but it depends on a version of Mac Common Lisp and the Mac OS that has been obsolete for decades.
BioBIKE is a web-based platform for doing knowledge-based bioinformatics. It was somewhat ahead of its time in doing a web-based notebook-like interface, and even more ahead of its time trying to do a complex visual interface in Javascript. Nowadays it would be much easier to build.
Unlike every other hack on this site, I didn't actually do much of the coding for the VPL; just pushed the vision forward.