Show HN: Spreadsheets for hierarchical data – real-time collaborative editing (datascribbler.com)

Author here. This was a scratch-an-itch project. I often run Excel to do some quick crunching of lists and data without saving anything - text processing, find-and-replace, script generation, stuff like that. I often find that the data I'm working with fits a collection model better than a row/column model.

I am hoping the usefulness demonstrates itself over time. Glad you found it cool. :)