Comparing products across brands (they all have specs but the way they sort the specs is different and it's a pain to flip through tons of tabs).
Finding a chair to fit my kitchen table (given the dimensions of both).
Diagramming my bedroom to try to figure out if I can build a better bed.
Finding furniture that fits in a given volume (in my case, I want to find a trolley or counter that's Y cm high, at least X cm long, and between Z1 and Z2 cm deep).
On point 3, have you tried Autodesk Homestyler? I used it for a similar purpose :)
They seem to be aiming to pay bills from the US; I want to send money from another country to the US and just do whatever I want with it.
> Autodesk Homestyler
I looked it up and it doesn't quite seem to be what I want. For one thing, I live in Japan, so none of my furniture is in the catalog.
For another, want to find a chair that physically (not cosmetically) fits my kitchen table. This goes back to my complaint about comparing specs, actually. :)