Ask HN: Tools for non-developers to create tools

Over the last year or so I've heard a number of tools mentioned that enable non-developers, or nearly-non-developers to create custom tools/workflows/processes. I'm interested in introducing one of these at my company to replace some spreadsheets, CMSs, etc, and was wondering if anyone had recommendations?

I'm keen to hear about all sorts of options: products, services, hosted, self-hosted, VC-backed, open-source... anything. I don't really have an opinion on what's good here, so would be keen to hear from your experiences.