I need something which allows me to interactively re-arrange the date on-the-fly --- if you've never worked w/ Improv it's hard to express. There was the begin

I need something which allows me to interactively re-arrange the date on-the-fly --- if you've never worked w/ Improv it's hard to express. There was the beginnings of an opensource implementation, Flexisheet, or see: https://instadeq.com/blog/posts/no-code-history-lotus-improv-spreadsheets-done-right-1991/ https://instadeq.com/blog/posts/no-code-history-lotus-improv...