Almost!

I see I commented in that thread, and I recall looking at a number of "kanban" style web apps. If I can't find the one I'm looking for, one of these may be able to be adapted, so thank you very much for finding that.

The one with the charcoal background was even simpler, and I think it was shown here later in the year, late summer or fall.

I'm not sure it will help, but it's a whole lot better than me guessing... The following is the query used to find flow.io. There's (about) 59 matches.

https://encrypted.google.com/search?num=100&pws=0&sa...

Thanks for reminding about site:, I'm reviewing all the threads mentioning kanban in case it's one of those.

If I do find it, I will update this thread.