wikiCalc
www.softwaregarden.com/products/wikicalc
From the page
Saved with the link. Notes from 2007 to 2016 are mostly the page's own words, so this is probably an excerpt.
The wikiCalc program lets you make web pages with more than just paragraphs of prose. It combines the ease of authoring and multi-person editing of a wiki with the familiar visual formatting and calculating metaphor of a spreadsheet. Written in Perl and r