[TimTheTinker]

Your comment makes me wonder if something like 1Password would be a better candidate for tracking household goods. You could trust it as much as you're willing to trust it with passwords.

I imagine clicking "New Item > Catalog" (which could create an in-vault Sqlite database). Perhaps they could also build a plugin system for third parties to provide nice-looking, domain-specific front-end UIs for tracking various types of things in 1Password.

Vaults can be up to 1GB in size -- more than enough for personal text data and relatively small images.