(ExceLint co-author and the speaker on this video here) The first one is the latest version which works in all modern Excel versions (Windows, Mac, Online). It’s a rewrite in TypeScript I did while on sabbatical this year at Microsoft Research (also it has faster and improved algorithms and more features to further improve its precision and usability). It is actively under development. Installation instructions are in the README. We are hoping to have it posted on the Microsoft store at some point. If you would like to see something like this in Excel, say so!

Cool! Does it include all the capabilities of https://github.com/plasma-umass/DataDebug or should/could both be installed?

Right now, ExceLint and CheckCell are not integrated. But this is something we would like to do!