[vfinn]

MS Word, huh. Hmm... Yes I guess it satisfies this one condition I have. Haven't used it for ages. But it's a key feature for me not to be cornered right from the start, so I would think it's ruled out anyway. Also, moving along the axes should be difficult without changing the document first, which is quite annoying, iirc.

Maybe I shouldn't have mentioned a Microsoft product, since I like Unix more. I just thought the problem is understood more easily that way.

Treesheets seems quite nice. Maybe I'll try it out, but I'm still hoping to find a cleaner alternative.