If you have an iOS device,
MyStuff2 Pro is a decent general inventory app. Setting up the database can be a bit of work (defining what fields you care about, the categories, etc) but I like that it's a versatile app that can track both my miniatures and my other valuables. Haven't poked at the barcode lookups in a while, but generally if an item is listed on Amazon you can map the fields for a category and just scan the barcode on the box and it'll pop in most of it. Quite handy. Quick backups to Google/iCloud also makes it useful for insurance if something horrible happens to have make/model/serial of major appliances and such (because everyone should have a general home inventory as well as a hobby one).
Obviously if you don't have such a device it's less useful, but if you do it's worth a poke in my opinion.