https://www.attorneyatwork.com/analog-attorney-5-best-index-cards/

Article about general usefulness of index cards written by a lawyer and for them, though not specific to them as a subgroup.

Makes not of Nock's Dot-Dash cards which were apparently 3 x 5" dash gridded cards similar to Midori's grid notebooks. The website for the company is no longer active. Archived site: https://web.archive.org/web/20171007102414/https://nockco.com/paper/dotdash-3-x-5-note-cards

https://scription.typepad.com/

Patrick Ng seems to be the inventor of a chronodex visual planning system. His website has half yearly printable planner inserts for Midori's Traveler's Notebooks.

One of his downloadable templates reads:

Chronodex ideas and notations are copyrighted, it is free for personal use, please contact Patrick Ng (patrickng@mac.com) for commercial usage.

Examples of chronodex layouts on his website show his uses which also seem to include some sketchnoting usage as well.

https://www.jptamerica.com/